Web Technologies
Assortment
Books to Download
HTML: The Definitive Guide
By Chuck Musciano and Bill Kennedy; ISBN: 1-56592-235-2, 531 pages.
Second Edition, May 1997. http://www.web-developer-india.com/web/html/
CGI Programming on the World Wide Web
By Shishir Gundavaram; ISBN: 1-56592-168-2, 433 pages.
First Edition, March 1996. http://www.web-developer-india.com/web/cgi/index.html
JavaScript: The Definitive Guide
By David Flannagan; ISBN: 1-56592-235-2, 637 pages.
Second Edition, January 1997 http://www.web-developer-india.com/web/jscript/index.html
Programming Perl
By Larry Wall, Tom Christiansen, & Randal Schwartz; 1-56592-149-6, 646 pages.
2nd Edition, September 1996 http://www.web-developer-india.com/web/perl/index.html
WebMaster in a Nutshell
By Stephen Spainhour & Valerie Quercia; ISBN: 1-56592-229-8, 356 pages.
First Edition, October 1996. http://www.web-developer-india.com/web/webnut/index.html
Apache
Apache Directives http://httpd.apache.org/docs/mod/directives.html
Article on Apache logs http://www.etailersdigest.com/resources/Specials/Log_Files.htm
ASP
Beginner
Expert
Lots of good information http://www.asp101.com/resources/visitors/index.asp
some info, not terrific, on ASP http://www.devhelper.net/training/corefiles/online/asp/index.htm
ASPfree http://www.aspfree.com/ (part of developershed.com)
CGI
CGI for newbies http://hoohoo.ncsa.uiuc.edu/cgi/
CGI Made Really Easy http://www.jmarshall.com/easy/cgi/
Ext http://cgi.resourceindex.com/
CGI Scripts http://cgidir.com/index.html
Beginner's Guide to CGI Scripting with Perl http://www.lies.com/begperl/
http://www.hostedscripts.com/
CSS
Kimberly's Picks
W3C Web Style Sheets home page http://www.w3.org/Style/
CSS2 Specification http://www.w3.org/TR/REC-CSS2/
CSS2.1 Specification http://www.w3.org/TR/CSS21/
CSS Reference http://wsabstract.com/dhtmltutors/cssreference.shtml
CSS1 Reference http://www.zvon.org/download2.php/css1Reference?title=CSS1+Reference
CSS2 Reference http://www.zvon.org/download2.php/CSS2Reference?title=CSS2+Reference
Accessibility Features of CSS http://www.w3.org/TR/CSS-access
Browser Compatibility charts
http://www.westciv.com/style_master/academy/browser_support/index.html
CSS Support for Tables http://www.macedition.com/cb/resources/tableCSStest.html
CSS2 Support in Mac-only Browsers http://www.macedition.com/cb/resources/macbrowsercsssupport.html
Abridged CSS2 Support Charts http://www.macedition.com/cb/resources/abridgedcsssupport.html
CSS3 Selector Support http://www.macedition.com/cb/resources/css3support_selectors.html
Good CSS Resource http://www.alistapart.com/
http://www.free2code.net/tutorials/webdev/css/19/css.php
CSS Attributes http://msdn.microsoft.com/workshop/author/css/reference/attributes.asp
CSS Length Unit Table http://msdn.microsoft.com/workshop/author/css/reference/lengthunits.asp
Good CSS Resources from Eric Meyers http://www.ericmeyeroncss.com/ and http://www.meyerweb.com/
Very good set of examples http://tantek.com/CSS/Examples/
An even better set of examles http://www.richinstyle.com/
Linking Style Sheets to HTML http://www.htmlhelp.com/reference/css/style-html.html
Style Sheet Examples http://style-sheet.info/ To see what's possible
Dan Cederholm has some good CSS articles http://www.simplebits.com/publications/tips/
Excellent tutorials, downloadable courses, and CSS products http://www.westciv.com/index.html
The CSS Pointers Group http://css.nu/ has good CSS pointers, articles, and examples
A few examples http://www.bluerobot.com/web/layouts/
Peter-Paul Koch http://www.quirksmode.org/ one of the CSS gurus
Martina Kosloff http://mako4css.com/ "CSS is much too interesting and elegant to be not taken seriously."
Introduction to CSS3 http://www.w3.org/TR/css3-roadmap/
CSS Glossary http://css-discuss.incutio.com/?page=CssGlossary
CVS
CVS Home https://www.cvshome.org/
CVS Server Setup and Info http://www.unixtools.org/cvs/server-how-to.html
MacCVS Client http://www.heilancoo.net/MacCVSClient/
Mac CVS GUI (client) http://www.wincvs.org/download.html#MACCVS
DCMI (Dublin Core Metadata Initiave)
Dublin Core Metadata Element Set, Version 1.0: Reference Description http://dublincore.org/documents/1998/09/dces/#
DCMI Tools and Software http://dublincore.org/tools/
Dublin Core Metadata Template http://www.lub.lu.se/cgi-bin/nmdc.pl?simple=1
Docs from the Swedish Institute of Computer Science
User Guidelines for Dublin Core Creation http://www.sics.se/~preben/DC/DC_guide.html
User Guidelines for DC Metadata creation-Short version http://www.sics.se/~preben/DC/DC_guide_short.html
Documents from Lund University
Dublin Core Metadata Template http://www.lub.lu.se/cgi-bin/nmdc.pl
Dublin Core Metadata Template (Short version) http://www.ub2.lu.se/metadata/DC_creator_simple.html
Docs from Dublincore.org
Using Dublin Core http://dublincore.org/documents/usageguide/
DCMI Type Vocabulary http://dublincore.org/documents/dcmi-type-vocabulary/
DCMI Metadata Terms http://dublincore.org/documents/dcmi-terms/
DCMI Metadata Terms: A complete historical record http://dublincore.org/usage/terms/history/
Dublin Core 1.1 Reference http://www.zvon.org/download2.php/DCreference?title=Dublin+Core+1.1+Reference
DHTML
http://dhtmlnirvana.com/
http://developer.netscape.com/openstudio/tech/index_frame.html?content=/tech/dynhtml/dynhtml.html
Command Identifiers http://msdn.microsoft.com/workshop/author/dhtml/reference/commandids.asp
Language Codes http://msdn.microsoft.com/workshop/author/dhtml/reference/language_codes.asp
Tips and Tricks http://msdn.microsoft.com/workshop/author/dhtml/reference/tips/tips.asp
DNS
DNS for Rocket Scientists http://www.zytrax.com/books/dns/
DOM (Document Object Model)
W3's DOM pages http://www.w3.org/DOM/
Gecko DOM reference http://www.mozilla.org/docs/dom/domref/dom_shortTOC.html
Basic DOM links http://www.mozilla.org/docs/dom/reference/index.html
Excellent set of DOM links http://www.mozilla.org/docs/dom/reference/links.html
DOM1 Reference http://www.zvon.org/download2.php/DOM1reference?title=DOM1+Reference
DOM2 Reference http://www.zvon.org/download2.php/DOM2reference?title=DOM2+Reference
ebXML (Electronic Business using eXtensible Markup Language)
http://www.ebxml.org/specs/
http://www-106.ibm.com/developerworks/xml/library/x-ebxml/
EPS & PS & PDF
Thinking In PostScript (book to download, 828kb) http://www.rightbrain.com/pages/book-download.shtml
Making an EPS file (v.PostScript) http://dspace.dial.pipex.com/quite/eps2.htm
Useful Scripts to work with EPS and PS files http://www.watsys.unh.edu/ScienceTechTalks/TechToolsFiles/Postscript-PDF/ps-epslist.html
Useful scripts to work with PDF files http://www.watsys.unh.edu/ScienceTechTalks/TechToolsFiles/Postscript-PDF/pdf-list.html
Discussion of PS v. EPS http://www.physics.ohio-state.edu/~dws/imageinfo/pdf_ps_eps.html
PDF Extensions http://www.artspdf.com/solutions/
PDF Tools & Docs http://www.pdfstore.com/
Binary Thing http://www.binarything.com/ "...specializing in Adobe® Acrobat® and PDF technology..."
http://www.planetpdf.com/
The PostScript Specification http://partners.adobe.com/public/developer/ps/index_specs.html
The PDF Specification http://partners.adobe.com/public/developer/pdf/index_reference.html
PDF Reference, Third Edition http://partners.adobe.com/public/developer/en/pdf/PDFReference.pdf
Flash
Good tutorials, etc. http://www.flashkit.com/index.shtml
FTP
Pretty decent tutorial http://www.lagcc.cuny.edu/webmanager/ftptutorial.htm
HTML
HTML Made Really Easy (tutorial) http://www.jmarshall.com/easy/html/
Barebones Guide to HTML http://www.werbach.com/barebones/download.html
http://www.htmlcodetutorial.com/
http://www.htmlgoodies.com/tutors/ several html tutorials
Tutorial http://www.htmlcodetutorial.com/
HTML Compendium http://www.htmlcompendium.org/Menus/index-e.htm
Tutorials on HTML, Javascript, etc. http://www.devx.com/projectcool/
HTML Entity Chart www.webmaster-toolkit.com/html-entity-chart.shtml shows special chars in the Latin ISO character set
HTML 4.0 reference http://www.htmlhelp.com/reference/html40/
Imagemap Tutorial http://hoohoo.ncsa.uiuc.edu/docs/tutorials/imagemapping.html
Introduction to HTML – from Case Western – Good content, but somewhat dated http://www.cwru.edu/help/introHTML/toc.html
HTML Tutorial http://www.functionx.com/html/index.htm
A beginners guide to HTML http://archive.ncsa.uiuc.edu/General/Internet/WWW/HTMLPrimer.html
Good Tutorial http://devhelper.net/training/corefiles/online/html/index.htm
Good set of tutorials from NoodleIncident http://www.thenoodleincident.com/tutorials/
Very good quick reference sheets on HTML, CSS, colors, etc. www.visibone.com/colorlab
The 16 Legal Color Names in HTML 4 and XHTML 1.0, 1.1 http://www.webstandards.org/learn/reference/color_names.html
HTML Elements http://msdn.microsoft.com/workshop/author/html/reference/elements.asp
Visual Filters and Transitions Reference http://msdn.microsoft.com/workshop/author/filter/reference/reference.asp
HTML REL and REV Attributes http://vancouver-webpages.com/META/reltags.detail.html
HTML Reference http://www.html-reference.com/ good reference & tutorials
Good info, from basics to advanced HTML from Jukka Korpela http://www.cs.tut.fi/~jkorpela/www.html
Good reference on HTML tags http://www.htmldog.com/reference/htmltags/
Reference: Alpha codes for HTML characters http://www.visibone.com/htmlref/char/ceralpha.htm
Meta
Forum for metadata schema implementers http://www.schemas-forum.org/
Dictionary of HTML META Tags http://vancouver-webpages.com/META/metatags.detail.html
HTML/Metadata Technical Documentation http://infoshare1.princeton.edu/katmandu/html/htmltoc.html
MetaTag FAQ http://vancouver-webpages.com/META/FAQ.html
HTTP-EQUIV
Dictionary of HTTP-EQUIV http://vancouver-webpages.com/META/metatags.shtml
HTTP
HTTP Response Headers http://msdn.microsoft.com/workshop/author/dhtml/reference/constants/response_headers.asp
HTTP Header Viewer http://www.webmaster-toolkit.com/http-header-viewer.shtml
HTTP Password generation tool http://www.euronet.nl/~arnow/htpasswd/
HTTP Made Really Easy (tutorial) http://www.jmarshall.com/easy/http/
robots.txt validator http://www.searchengineworld.com/cgi-bin/robotcheck.cgi
View HTTP Request and Response Header http://web-sniffer.net/
HTTP Request Viewer http://www.delorie.com:81/some/url.html – What the browser sends to the server
HTTP Header Viewer http://www.delorie.com/web/headers.html
Many creative HTTP 404 Error Code Pages http://www.404lounge.net/
HTTP Cookies: (Also see JavaScript Cookies)
IE-SpecificTechnologies
AlphaImageLoader Filter http://msdn.microsoft.com/workshop/author/filter/reference/filters/alphaimageloader.asp
Introduction to HTML+TIME http://msdn.microsoft.com/workshop/author/behaviors/time.asp
Microsoft JScript docs http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/js56jsoriJScript.asp
IP
IP Addressing and Subnet Guide http://transcend.btrd.ab.ca/article_showall.asp?cat_...
Subnetting tutorial http://www.ralphb.net/IPSubnet/
Understanding IP Addressing: Everything You Ever Wanted To Know http://www.3com.com/other/pdfs/infra/corpinfo/en_US/501302.pdf
List of IP protocols: Network layer, Transport layer, Application layer http://www.networksorcery.com/enp/topic/ipsuite.htm
ISDN
Tutorial http://www.ralphb.net/ISDN/
Jabber A set of open streaming XML protocols and technologies to facilitate instant messaging
http://www.jabber.org/
http://www.jabberstudio.org/
Java
Java Tutorial http://java.sun.com/docs/books/tutorial/
Very good Java resource http://www.apl.jhu.edu/~hall/java/
JavaScript (ECMAScript)
Online book or tutorial set “Learning Javascript” http://devhelper.net/training/corefiles/online/javascript/
Good quick reference for JavaScript http://javascript-reference.info/
Good tutorial http://devhelper.net/training/corefiles/online/javascript/
JavaScript Central http://devedge.netscape.com/central/javascript/
Standard ECMA-262 ECMAScript Language Specification http://www.ecma-international.org/publications/files/ecma-st/ECMA-262.pdf
JS tutorial http://www.freewebmasterhelp.com/tutorials/javascript/1
Very good JS Tutorial http://www.webdevelopersnotes.com/tutorials/javascript/index.php3
Cool set of JS favelet http://centricle.com/tools/favelets/
Another cool set of JS favelets http://slayeroffice.com/
Essential Javascript – Tutorial http://www.informit.com/articles/article.asp?p=29977&seqNum=1
Another JS tutorial http://oopweb.com/JavaScript/Documents/JST/Volume/c1.html
Reference: Regular Expressions for client-side JavaScript http://www.visibone.com/regular-expressions/
Good JS Debugging Guide http://javascript.internet.com/debug-guide.html
O'reilly has a few good articles http://www.oreillynet.com/pub/ct/31
Canned Scripts (freeware):
http://www.javafile.com/
http://javascript.internet.com/
http://www.javascript.com/
JavaScript Cookies: (Also see HTTP Cookies)
Decent intro to HTTP cookies & JS cookies http://www.webreference.com/js/column8/
The Unofficial Cookie FAQ http://www.cookiecentral.com/faq/
JPG & JFIF – Joint Photographic Experts Group
ISO JPEG standards committee http://www.jpeg.org/index.html "...official site of the Joint Photographic Experts Group, JPEG, and ... JBIG."
Independent JPEG Group http://www.ijg.org/ "IJG is not affiliated with the ISO committee."
JPEG compression specification http://www.w3.org/Graphics/JPEG/itu-t81.pdf
JFIF file format http://www.w3.org/Graphics/JPEG/jfif3.pdf
JSP – Java Server Pages
http://java.sun.com/products/jsp/
LDAP
LDAP for Rocket Scientists http://www.zytrax.com/books/ldap/
MNG – Multiple-Image Network Graphics
http://www.libpng.org/pub/mng/
http://www.libmng.com/
Mozilla
http://www.mozdev.org/
Documentation http://mozmanual.mozdev.org/source.html
MozManual: An Introduction to Mozilla http://mozmanual.mozdev.org/
Browser Sidebars – oriented towards developers http://www.tntluoma.com/sidebars/
MySQL
http://www.mysql.com
P3P
HT Deploy P3P Privacy Policies on Your Web Site http://msdn.microsoft.com/workshop/security/privacy/overview/createprivacypolicy.asp
PERL
http://www.perl.org/
Comprehensive Perl Archive Network http://cpan.org/
PGP
http://www.openpgp.org/
http://www.pgp.com/
http://www.pgpi.org/
PGP 7.0 Mac User's Guide ftp://ftp.pgpi.org/pub/pgp/7.0/docs/english/PGPMacUsersGuide.pdf
Phil Zimmerman, creator of PGP http://www.philzimmerman.com/index.shtml
http://helppages.obsidian.com.au/PGPKeys
PHP
http://www.php.net/
http://us3.php.net/links.php?PHPSESSID=20f70d8591f7e6fa7c6c09cfe9cb1425 Excellent set of links
PHP Template Engines – article http://www.massassi.com/php/articles/template_engines/
PICS
Platform for Internet Content Selection (PICS) http://www.w3.org/PICS/
PICS FAQ http://www.w3.org/2000/03/PICS-FAQ/
PICS generator http://www.safesurf.com/classify/
PICS Rating Generator http://vancouver-webpages.com/VWP1.0/VWP1.0.gen.html
PICS Inspector http://www.safesurf.com/inspect/
PNG
http://www.libpng.org/pub/png/ Lots of good info
http://www.libpng.org/pub/png/libpng.html "...the official PNG reference library."
From W3C http://www.w3.org/Graphics/PNG/
Technical Issues Regarding the PNG File Format http://www.cs.toronto.edu/~cosmin/pngtech/
Discussion of why PNGs are preferred over GIFs http://burnallgifs.org/
PURL – Persistent Uniform Resource Locator
http://purl.org/
RDF – Resource Description Framework
Describing and retrieving photos using RDF and HTTP http://www.w3.org/TR/photo-rdf/
RegExp – Regular Expressions
RegExp tutorial http://www.regular-expressions.info/tutorial.html
RSS – R...
Feed Validator http://feedvalidator.org/news/
RSS 0.90 Specification http://www.purplepages.ie/RSS/netscape/rss0.90.html
SGML – Standard Generalized Markup Language
Overview of SGML Resources http://www.w3.org/MarkUp/SGML/
Standard Generalized Markup Language (SGML) http://xml.coverpages.org/sgml.html
SMIL – Synchronized Multimedia Integration Language
Synchronized Multimedia Integration Language (SMIL 2.0) http://www.w3.org/TR/smil20/
SSL
ModSSL – strong cryptography for the Apache 1.3 webserver http://www.modssl.org/
Open SSL Project http://www.openssl.org/
SSL 3.0 Specification http://wp.netscape.com/eng/ssl3/
A Guide To Understanding SSL Certificates They would like your contact info
SVG – Scalable/Styling Vector Graphics
SVG 1.1 Specification http://www.w3.org/TR/SVG11/
An Introduction to Scalable Vector Graphics http://www.xml.com/pub/a/2001/03/21/svg.html
SWF
http://www.swftools.com/index.php "Directory of tools, utilities extending the functionality of Macromedia Flash, and tools with SWF output."
TCP/IP
TIFF
http://www.libtiff.org/
TLS
TLS Protocol 1.0 http://www.ietf.org/rfc/rfc2246.txt
Unicode – And other character representations
Unicode Character Database http://www.unicode.org/ucd/
Codes for the Representation of Names of Languages http://www.loc.gov/standards/iso639-2/englangn.html
Comprehensive data on a variety of character sets http://www.eki.ee/letter/
Non-English Keyboards for Macintosh OS X http://tlt.its.psu.edu/suggestions/international/keyboards/mackey.html
Unicode and Multilingual Support in HTML, Fonts, Web Browsers and Other Applications http://www.alanwood.net/unicode/
Glossary of Unicode Terms http://www.unicode.org/glossary/
Tool: Unicode Char. Search http://www.zvon.org/other/charSearch/PHP/search.php
Unicode Enabled Products http://www.unicode.org/onlinedat/products.html
Charts of unicode support for a variety of products http://crlam.free.fr/unicode_support.html
XHTML – Extensible HyperText Markup Language
The XHTML 1.0 specification http://www.w3.org/TR/xhtml1/
XHTML Tests http://tantek.com/XHTML/Test/
From IBM: XHTML 1.0: Marking up a new dawn http://www-106.ibm.com/developerworks/library/w-xhtml.html
XHTML Basic Reference http://www.zvon.org/download2.php/xhtmlBasicReference?title=%5BXHTML+Basic%5D+Reference
XML
W3C: XML in 10 points http://www.w3.org/XML/1999/XML-in-10-points
A List Apart: A Child’s Garden of XML http://www.alistapart.com/articles/xmlgarden/
Browser Problems with the XML Prolog http://www.webstandards.org/learn/reference/prolog_problems.html
http://diveintomark.org/
http://www.zvon.org/index.php?nav_id=downloads&mime=html "The Guide To The XML Galaxy"
http://www.perfectxml.com/
XML Glossary http://www.zvon.org/index.php?nav_id=173
XSL – eXtensible Style Language
W3C Web Style Sheets home page http://www.w3.org/Style/
CSS v. XSL http://www.w3.org/Style/CSS-vs-XSL
Extensible Stylesheet Language Family (XSL) http://www.w3.org/Style/XSL/
XUL
(XML User-interface Language) http://xulplanet.com/
Sites covering multiple technologies
A List Apart http://www.alistapart.com/
Code Comments http://www.codecomments.com/ Forums on Data Compression, PHP, Java, much more
Coverpages http://xml.coverpages.org/ "Online resource for markup language technologies"
Developer Shed http://www.developershed.com/
HTML Help http://www.htmlhelp.com/ HTML, CSS Fairly elementary
HTML Goodies http://www.htmlgoodies.com/ JS, CGI, XML, ASP, etc.
Internet Primer http://www.dshield.org/primer.php – IP, DNS, Ports, TCP, UDP, ICMP, Firewalls
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnanchor/html/anch_webdev.asp
MSDN Web Workshop index-A http://msdn.microsoft.com/workshop/index/index1-1.asp
MSDN Web Workshop index-B http://msdn.microsoft.com/workshop/index/index1-2.asp
.
.
.
MSDN Web Workshop index-Z http://msdn.microsoft.com/workshop/index/index1-26.asp
PageResource http://www.pageresource.com/ HTML, DHTML, CGI/Perl, JavaScript
PurplePages http://www.purplepages.ie/site/webmasters/links/default.asp ASP, CSS, DHTML, HTML, PHP, XML,...
TechUser http://www.techuser.net/ Limited, but good information about getting started with web sites; not frequently updated
Webdeveloper – multiple topics, forum http://www.webdeveloper.com/
Web Developer's Virtual Library http://wdvl.internet.com/Vlib/ well-organised goldmine of tutorials, examples, and links to great resources
Weberdev http://www.weberdev.com/ PHP, MySQL, more
Webmonkey http://hotwired.lycos.com/webmonkey/ lots of web dev info, but ad-intensive
Web Pro World http://www.webproworld.com/ "...the World's Forum for eBusiness."
W3C: Tutorials on a variety of technologies http://www.w3.org/2002/03/tutorials.html
Generation Tools
Color Tools:
CSS Tools
Javascript – Generator for window.open http://www.blooberry.com/indexdot/html/topics/windowopen.htm
HTML Tidy – cleans up an HTML page http://infohound.net/tidy/
HTTP Password generation tool http://www.euronet.nl/~arnow/htpasswd/
Dublin Core meta data editor http://www.ukoln.ac.uk/metadata/dcdot/
Metatag generators
PICS generators
P3P Policy Generation Tool https://www.privacycouncil.com/p3psignup.php
A variety of HTML generation tools for various effects http://www.layoutland.net/Pages/Generators.htm
Create Analog .cfg & .bat files for Analog Apache log analyzer http://www.rix-web.com/analyzer/
Similar tool in both German and English; seems to have more options http://www.hillschmidt.de/ger/analog.cfg_form.htm
Slide-show generation tool http://my.opera.com/community/dev/operashow/generator.html Slide show created in XHTML
Network Diagnosis Tools
Ping, lookup, Xwhois, Trace, DNS Records http://network-tools.com/
Trace Ping Flap Statistics Dampened Paths http://oxide.sprintlink.net/cgi-bin/glass.pl
Trace Route Ping from Level 3 sites BGP table query etc. http://www.level3.com/LookingGlass/
Returns lots of info about your immediate session http://privacy.net/analyze/
Metalinks of diagnosis sites http://transcend.btrd.ab.ca/links_...
Privacy analysis of your current internet session http://privacy.net/analyze/
Validation, Inspection and Analysis Tools
Browser Validation
Entity References Test Document http://www.utoronto.ca/webdocs/HTMLdocs/NewHTML/en_test.html
CSS Analyzer
SelectOracle from The Opal Group http://gallery.theopalgroup.com/selectoracle/ English (or Spanish) explanation of complex rule sets
CSS Validation Tool http://jigsaw.w3.org/css-validator/ Paste the CSS text, upload the CSS file, or point to a URI
CSS1 Test Suite from W3C http://www.w3.org/Style/CSS/Test/CSS1/current/
HTML MetaTag Analysis
http://www.scrubtheweb.com/abs/meta-check.html
http://www.netmechanic.com/powerpack/meta.htm
http://www.keywordcount.com/ Analyzes your page for keyword count and relevancy
ICRA label tester http://www.icra.org/_en/label/tester/
Link Validation Tool http://validator.w3.org/checklink
Link Valet - a validator http://www.htmlhelp.com/tools/valet/
HTML & XHTML Validation Tool – Fill in a URL http://validator.w3.org/detailed.html
HTML & XHTML Validation Tool – Upload a file http://validator.w3.org/file-upload.html
Tidy (cleans up HTML) http://tidy.sourceforge.net/
508 Accessibility Issues Access Board http://www.access-board.gov/
Ensure 508 compatibility of pages
PICS Inspector http://www.safesurf.com/inspect/
P3P
W3 P3P Validator http://www.w3.org/P3P/validator.html
P3P Compact Policy Interpreter http://www.davidjonathangrant.info/p3p/
RDF Validation http://www.w3.org/RDF/Validator/
RegExp Tester http://catcode.com/cit041j/regtest.html
XHTML Validation Tool http://validator.w3.org/check/referer
XHTML Tests http://tantek.com/XHTML/Test/
Miscellaneous validators
robots.txt validator http://www.searchengineworld.com/cgi-bin/robotcheck.cgi
Feed Validator for Atom & RSS http://www.feedvalidator.org/
Miscellaneous Tools
Conversion Tools
Webmaster glossary http://www.webmasterworld.com/glossary/
Add annoying monologues to your web pages http://audiogenerator.com
Unix file permissions calculator http://www.sloppycode.net/Reference/Unix/