- JQuery - Feels like a .net framework for javascript
- JQueryUi - Ah a (ightweight custom control library
- JQuerify - Inject jQuery onto pages that don't have it for making bookmarklets.
I've used Visual Studio 2010 Ultimate primarily for the script writing because of the code/syntax coloring and built in (poor but still built in) {} () [] matching capabilities. Those aren't specific to Ultimate, or 2010 for all I know.
For debugging scripts I've used
- FireBug
- Google Chrome's built-in developer tool bar (alot)
- JsBin - online javascript collaborative debugger (seemed slightly buggy, but still worth it)
- Javascript Lint - nice online static analyzer for syntax and other problems.
On top of those as base scripts to help with life
- qTip - Nice jQuery plugin tool tip script for web pages
- Google's lovely api hosting content delivery network for jQuery, and jQueryUi.
- Sidenote: apparently resizable, and who knows what else required I also reference "http://ajax.googleapis.com/ajax/libs/jqueryui/1/themes/base/jquery-ui.css"