LINQPad - A scratchpad for C#, F# and VB code including Linq queries.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
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!
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Snippet Compiler - Authors description: "Snippet Compiler compiles snippets."
Trumail - Free email verification API