Email Verification on Google Sheets - An add-on for email verification directly in Google Sheets
LINQPad - A scratchpad for C#, F# and VB code including Linq queries.
Verifier - Weed out disposable, non-existent domains or invalid emails.
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!
Clearbit Salesforce Prospector - Quickly build targeted lead lists directly in Salesforce
Snippet Compiler - Authors description: "Snippet Compiler compiles snippets."