Zeal - Zeal is an API Documentation Browser.
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!
DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
Snippet Compiler - Authors description: "Snippet Compiler compiles snippets."
Snippely - Snippely is a basic text and code organizational tool.
Linqer - Linqer is a SQL to LINQ converter tool.