I wrote about my top 5 favorite applications for Windows Mobile developers earlier this month.
I've now added a list of my favorite free tools/apps on the right side of this blog.
The new additions include:
AVG: excellent free anti-virus. I would recommend upgrading to the paid version if you find it useful but the free version offers excellent and reliable basic protection.
Trillian: A great IM client that handles multiple accounts and most common IM protocols including MSN, AIM, Yahoo, GoogleTalk, etc. The Pro version doesn't offer much beyond the free version but I registered to support this excellent product.
CamStudio: An amazing open source screen capture utility.
NSIS: In my opinion, the best installer creatation tool. This tool trumps every paid installation creation tool I've ever used. Developed by the same team that created WinAMP. Its also open source.