Windows Internet Explorer Developer Center This site contains web developer resources for building great looking, cross-browser web sites with HTML, the Document Object Model (DOM), Dynamic HTML (DHTML), and Cascading Style Sheets (CSS). http://msdn2.microsoft.com/en-us/ie/default.aspx
Safari 3.1: Safari 3.1 is available immediately as a free download at http://www.apple.com/safari for both Mac OS X and Windows users.
Safari 3.1 for Mac OS X requires Mac OS X Leopard(R) or Mac OS X Tiger(R) version 10.4.11, a minimum of 256MB of memory and is designed to run on any Intel-based Mac or a Mac with a PowerPC G5, G4 or G3 processor and built-in FireWire(R). Safari 3.1 for Windows requires Windows XP or Windows Vista, a minimum of 256MB of memory and a system with at least a 500 MHz Intel Pentium processor. Safari 3.1 is the first browser to support the new video and audio tags in HTML 5 and the first to support CSS Animations. Safari also supports CSS Web Fonts, giving designers limitless choices of fonts to create stunning new web sites. Pricing & Availability
http://blog.monstuff.com/archives/000250.html Greasemonkey user script to trace XMLHttpRequest calls in the javascript console. It logs the "open" and "send" calls, as well as the response status code and text. Its purpose is to help peek into AJAX applications, to learning or troubleshooting, without having to run a network sniffer.
AJAX Debugging with Greasemonkey
http://blog.monstuff.com/archives/000252.html XMLHttpRequest debugging console, a floating div embedded in the page being debugged. This replaces the javascript console, which the previous script used for tracing. Each individual XMLHttpRequest invocation will get listed there, with all the details on the request and the response, as well as options to edit and replay the request or replay the response callback.