LINQPad - A scratchpad for C#, F# and VB code including Linq queries.
TeamCity - TeamCity is an ultimate Continuous Integration tool for professionals
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!
CAKE - CAKE provides a SaaS-based solution for advertisers, publishers and networks to track, attribute and optimize their spend in real-time.
Linqer - Linqer is a SQL to LINQ converter tool.
ReSharper - ReSharper is a productivity tool for visual studio that provides tools and features to help you manage your code.