June 21st, 2007
If you’re serious about web developing, stop whatever you’re doing now and download the latest WebKit Nightly, which includes the over-sweet new Web Inspector.

Apple seems to be quite serious on their support for Safari on Windows, as you get the same kind of top-notch debugging and analyzing facilities as on the Mac (of course, on the Mac everything is a little bit better looking).
June 12th, 2007
Kjell Bublitz who already contributed a CHM version of the Prototype API documentation strives for more glory with a very nice compilation of CHM and PDF script.aculo.us offline docs, plus a printable PDF for reference.
It’s small and fast download, and very welcome as a quick reference!
The docs are made from the wiki contents, so if everyone helps cleaning up the wiki and adding more examples and more descriptions, these offline docs will get even better!
Read more on Kjell’s site.
P.S. Want to use the CHM version on a Mac? Grab Chmox, it’s free and works well with the docs.