I've been meaning to do a roll-up of top JavaScript, CSS & HTML development tools that I use or have been recommended to me and after having lunch with my bud Brian Wilpon today, I realized I just needed to do it. He asked me what some of the newer tools are and I think this is the best way to help him (and the community in general). Here they are by category:

Debugging Tools:

IE 8 Developer Tools (<a href="http://msdn.microsoft.com/en-us/library/dd565628%28VS.85%29.aspx">http://msdn.microsoft.com/en-us/library/dd565628%28VS.85%29.aspx</a>)
Firebug (<a href="http://getfirebug.com/">http://getfirebug.com/</a>)
WebKit Web Inspector (<a href="http://trac.webkit.org/wiki/WebInspector">http://trac.webkit.org/wiki/WebInspector</a>)
Fiddler (<a href="http://www.fiddler2.com/fiddler2/">http://www.fiddler2.com/fiddler2/</a>)
Charles (<a href="http://www.charlesproxy.com/">http://www.charlesproxy.com/</a>)
Service Capture (<a href="http://kevinlangdon.com/serviceCapture/">http://kevinlangdon.com/serviceCapture/</a>)
dynaTrace (<a href="http://www.dynatrace.com/en/application-performance-management-product.aspx">http://www.dynatrace.com/en/application-performance-management-product.aspx</a>)
dynaTrace Ajax (<a href="http://ajax.dynatrace.com/pages/">http://ajax.dynatrace.com/pages/</a>)
Web Developer’s Toolbar (<a href="http://chrispederick.com/work/web-developer/">http://chrispederick.com/work/web-developer/</a>)
YSlow <a href="http://developer.yahoo.com/yslow/">http://developer.yahoo.com/yslow/</a>
PageSpeed <a href="http://code.google.com/speed/page-speed/">http://code.google.com/speed/page-speed/</a>
Live HTTP Headers <a href="https://addons.mozilla.org/en-US/firefox/addon/3829">https://addons.mozilla.org/en-US/firefox/addon/3829
</a>
CSS:

TopStyle http://www.topstyle4.com/
Rapid CSS http://www.blumentals.net/rapidcss/
Xyle http://www.culturedcode.com/xyle/
Stylizer http://www.skybound.ca/stylizer/
CSSEdit http://www.macrabbit.com/cssedit/

CSS Frameworks:

960 Grid System http://960.gs
Blueprint CSS Framework http://blueprintcss.org/
YAML http://www.yaml.de/en/
Yahoo YUI Grids CSS http://developer.yahoo.com/yui/grids/
Tripoli http://devkick.com/lab/tripoli/

CSS Resets:

Meyer Reset by Eric Meyer http://meyerweb.com/eric/tools/css/reset/
YUI2: Reset CSS http://developer.yahoo.com/yui/reset/
IECSS http://www.iecss.com/

JavaScript Libraries:

jQuery http://jquery.com/
jQuery UI http://jqueryui.com/
Prototype http://prototypejs.org/
MooTools http://mootools.net/
Dojo http://dojotoolkit.org/
YUI http://developer.yahoo.com/yui/

Color Management:

Colourlovers http://www.colourlovers.com/
Kuler http://kuler.adobe.com/

Editors and IDEs:

Visual Studio http://msdn.microsoft.com/en-us/vstudio/default.aspx
Expression http://www.microsoft.com/expression/
TextMate http://macromates.com/
Coda http://panic.com/coda/
UltraEdit http://www.ultraedit.com/
Komodo IDE http://www.activestate.com/komodo/
Notepad++ http://notepad-plus.sourceforge.net/uk/site.htm
BBEdit http://www.barebones.com/products/bbedit/

Wireframing:

Omnigraffle http://www.omnigroup.com/
Balsamiq http://www.balsamiq.com/
FlairBuilder http://www.flairbuilder.com/
Visio http://office.microsoft.com/en-us/visio/default.aspx

Browser Testing:

BrowserCam http://www.browsercam.com/Default2.aspx
Adobe BrowserLab https://browserlab.adobe.com/index.html
Microsoft Expression Web SuperPreview for IE http://www.microsoft.com/downloads/details.aspx?FamilyID=8e6ac106-525d-45d0-84db-dccff3fae677&displaylang=en
Gomez http://www.gomez.com/products-solutions/products/cross-browser-testing/
TredoSoft MultipleIE http://tredosoft.com/Multiple_IE
CrossBrowserTesting http://crossbrowsertesting.com/
Multi-Safari http://michelf.com/projects/multi-safari/
Mozilla Labs TestSwarm http://testswarm.com/
Browserscope http://www.browserscope.org/
Cuzillion http://stevesouders.com/cuzillion/help.php
IETester http://www.my-debugbar.com/wiki/IETester/HomePage


Testing:

JSLint http://jslint.com/
jQuery Lint http://github.com/jamespadolsey/jQuery-Lint
JSUnit http://www.jsunit.net/
Selenium Core http://seleniumhq.org/projects/core/
JSSpec (MooTools) http://jania.pe.kr/aw/moin.cgi/JSSpec
UnitTestJS (Prototype) http://github.com/tobie/unittest_js/tree/master
QUnit (jQuery) http://docs.jquery.com/QUnit
DOH Unit Testing (Dojo) http://docs.dojocampus.org/quickstart/doh
YUITest 2 http://developer.yahoo.com/yui/yuitest/
YUITest 3 http://developer.yahoo.com/yui/3/test/
Mochitest https://developer.mozilla.org/En/Mochitest
ScrewUnit http://github.com/nkallen/screw-unit/tree/master
JsUnitTest http://jsunittest.com/
jsUnity http://jsunity.com/ 
JsTestDriver http://code.google.com/p/js-test-driver/
Crosscheck http://www.thefrontside.net/crosscheck
Env.js http://groups.google.com/group/envjs 
FireUnit http://fireunit.org/
W3C Markup Validation Service http://validator.w3.org/
W3C CSS Validation Service http://jigsaw.w3.org/css-validator/
SunSpider http://www2.webkit.org/perf/sunspider-0.9/sunspider.html
V8 Benchmark http://code.google.com/apis/v8/run.html
Dromaeo http://v2.dromaeo.com/
JSLitmus http://broofa.com/Tools/JSLitmus/

Misc:

APIs: http://www.programmableweb.com/
jQuery Docs: http://api.jquery.com/
jQuery UI Docs: http://jqueryui.com/demos/
MooTools Docs: http://mootools.net/docs/core
Prototype Docs: http://api.prototypejs.org/
Dojo Docs: http://dojotoolkit.org/documentation/
JavaScript & HTML Reference http://www.w3schools.com/jsref/default.asp
JSON Reference http://json.org/
JSONP http://en.wikipedia.org/wiki/JSON#JSONP
