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 <a href="http://www.topstyle4.com/">http://www.topstyle4.com/</a>
Rapid CSS <a href="http://www.blumentals.net/rapidcss/">http://www.blumentals.net/rapidcss/</a>
Xyle <a href="http://www.culturedcode.com/xyle/">http://www.culturedcode.com/xyle/</a>
Stylizer <a href="http://www.skybound.ca/stylizer/">http://www.skybound.ca/stylizer/</a>
CSSEdit <a href="http://www.macrabbit.com/cssedit/">http://www.macrabbit.com/cssedit/</a>

CSS Frameworks:

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

CSS Resets:

Meyer Reset by Eric Meyer <a href="http://meyerweb.com/eric/tools/css/reset/">http://meyerweb.com/eric/tools/css/reset/</a>
YUI2: Reset CSS <a href="http://developer.yahoo.com/yui/reset/">http://developer.yahoo.com/yui/reset/</a>
IECSS <a href="http://www.iecss.com/">http://www.iecss.com/</a>

JavaScript Libraries:

jQuery <a href="http://jquery.com/">http://jquery.com/</a>
jQuery UI <a href="http://jqueryui.com">http://jqueryui.com/</a>
Prototype <a href="http://prototypejs.org/">http://prototypejs.org/</a>
MooTools <a href="http://mootools.net/">http://mootools.net/</a>
Dojo <a href="http://dojotoolkit.org/">http://dojotoolkit.org/</a>
YUI <a href="http://developer.yahoo.com/yui/">http://developer.yahoo.com/yui/</a>

Color Management:

Colourlovers <a href="http://www.colourlovers.com/">http://www.colourlovers.com/</a>
Kuler <a href="http://kuler.adobe.com/">http://kuler.adobe.com/</a>

Editors and IDEs:

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

Wireframing:

Omnigraffle <a href="http://www.omnigroup.com/">http://www.omnigroup.com/</a>
Balsamiq <a href="http://www.balsamiq.com/">http://www.balsamiq.com/</a>
FlairBuilder <a href="http://www.flairbuilder.com/">http://www.flairbuilder.com/</a>

Browser Testing:

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

Testing:

JSLint <a href="http://jslint.com/">http://jslint.com/</a>
jQuery Lint <a href="http://github.com/jamespadolsey/jQuery-Lint">http://github.com/jamespadolsey/jQuery-Lint</a>
JSUnit <a href="http://www.jsunit.net/">http://www.jsunit.net/</a>
Selenium Core <a href="http://seleniumhq.org/projects/core/">http://seleniumhq.org/projects/core/</a>
JSSpec (MooTools) <a href="http://jania.pe.kr/aw/moin.cgi/JSSpec">http://jania.pe.kr/aw/moin.cgi/JSSpec</a>
UnitTestJS (Prototype) <a href="http://github.com/tobie/unittest_js/tree/master">http://github.com/tobie/unittest_js/tree/master</a>
QUnit (jQuery) <a href="http://docs.jquery.com/QUnit">http://docs.jquery.com/QUnit</a>
DOH Unit Testing (Dojo) <a href="http://docs.dojocampus.org/quickstart/doh">http://docs.dojocampus.org/quickstart/doh</a>
YUITest 2 <a href="http://developer.yahoo.com/yui/yuitest/">http://developer.yahoo.com/yui/yuitest/</a>
YUITest 3 <a href="http://developer.yahoo.com/yui/3/test/">http://developer.yahoo.com/yui/3/test/</a>
Mochitest https://developer.mozilla.org/En/Mochitest
ScrewUnit <a href="http://github.com/nkallen/screw-unit/tree/master">http://github.com/nkallen/screw-unit/tree/master</a>
JsUnitTest <a href="http://jsunittest.com/">http://jsunittest.com/</a>
jsUnity <a href="http://jsunity.com/">http://jsunity.com/</a> 
JsTestDriver <a href="http://code.google.com/p/js-test-driver/">http://code.google.com/p/js-test-driver/</a>
Crosscheck <a href="http://www.thefrontside.net/crosscheck">http://www.thefrontside.net/crosscheck</a>
Env.js <a href="http://groups.google.com/group/envjs">http://groups.google.com/group/envjs</a> 
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
