iPodCALsync is has been tested with Windows XP, should work fine on Windows 2000 machines and has been reported to work with Windows Vista.

These sites currently host iPodCALsync:

Latest version: iPodCALsync v0.2 (685KB, 100% malware-free)
Release date: January 20th 2008
Changes: this version features some interface tweaks, improvements to the installer, bugfixes and minor updates. You can now sync up to ten calendars with your iPod and change the interval between automatic iPod checks.

Older versions

iPodCALsync v0.1.1
iPodCALsync v0.1 (build 070111)
iPodCALsync v0.1 (build 070101)