From notepad replacement to screen recorders, here are some software I use on a daily basis. You'll also probably get a few DP out of it, because I'm sure you haven't visited these sites! Anyway here is the list of software:
1. Notepad2 - a replacement for Windows Notepad: VITAL!
2. RSS Bandit - a desktop news aggregator: Couldn't live without it!
3. IMGBURN - ISO/IMG/CD-ROM/DVD burning studio: the best free software, better than Nero or Roxio
4. DemoWorks - screen recording software.
5. Aptana IDE - IDE for php, html, xml, and more.
These are just some of the unkonwns, didn't want to run you around with Google Sketchup (awesome), Skype, etc which you should already have!