3Cols - Manage your code snippets in the cloud fast, easy and free for personal use forever.
LINQPad - A scratchpad for C#, F# and VB code including Linq queries.
Lepton - Lepton image compression: saving 22% losslessly from images at 15MB/s
LINQ Insight - Execute LINQ Queries directly from Visual Studio without building the application. Verify your LINQ queries in a single click and view data with LINQ Insight!
Boostnote - Boostnote is an open-source note-taking app.
Dot Net Editor - An VB/C# text editor with the ability to run code and code snippets.