Below are my development tools which I depend on daily basis:
IDE:
VS.NET 2003
Macromedia Dreamweaver
Macromedia Flash 2004 Pro
Snippet Compiler
Editors:
Notepad++
Debugging:
Fiddler
Servterm
Web Developer Toolbox
Others:
Regulator
FxCop
.NET Reflector
ASP.NET Version Switcher