.Net development tools:Color Gadget.

Select a .NET KnownColor or other color, copy RGB and hex values to the clipboard.

Snippet Compiler is a Windows-based  applications, you can use it to write, compile and run code. Snippet Compiler now has support. NET Framework 3.5, the latest version Snippet Compiler Live 2008 Ultimate Edition for Developers (Alpha).
Home: http://www.sliver.com/dotnet/SnippetCompiler/