In no particular order:
1)
formatting link
for updates to Tera Term.
2) Ultraedit-32. Great windows text editor. Everyone that looks at router configuration should use it. The ability to collapse interface/crypto/ACL for easier reading has been added to recent versions.
3) TCLOCKEx. Great littl time/calendar program.
4) XanaNews. GREAT GREAT GREAT newsreader.
5) XCalc. rpn calculator.
6) MultiTrack Calculator.
7) PuTTy. One file telnet client (but lacks serial/console support)
8) ZOC. Full featured telnet/ssh2 client. But I keep just using Tera Term.