It's now a casual thing to publish the tools you used, so here is my list (for a .Net developer):
- Visual Studio 2008/2010 Pro
- Visual Studio Power Commands Add-In
- Web Deployment Project 2008/2010
- JetBrains Resharper 5.x
- Sybase PowerDesigner
- Enterprise Library Blocks (Data, PolicyInjection)
- MyGeneration (Code Generation)
- MS Build (+ Commuity Tasks)
- NUnit
- Wix
- JetBrains TeamCity
- Redgate Reflector
- Redgate SQL Compare
- TortoiseSVN
- VisualSVN
- SandCastle + Help File Builder
- Firefox (with Firebug)
- Chrome
- Notepad++
- Softerra LDAP Browser
- Paint .Net
- TrueCrypt
- FileZilla
- SyncToy 2.0
If you'd like more tools, check out others' list
