LINQPad Alternatives, Similar

LINQPad lets you interactively query SQL databases in a modern query language: LINQ. Kiss goodbye to SQL Management Studio!LINQPad supports everything in C# 3.0 and Framework 3.5:LINQ to Objects
LINQ to SQL
Entity Framework
LINQ to XML
(Even old-fashioned SQL!)
LINQPad is also a great way to learn LINQ: it comes preloaded with 200 examples from the book, C# 3.0 in a Nutshell. Theres no better way to experience the coolness of LINQ and functional programming. More Info »And LINQPad is more than just a LINQ tool: its a highly ergonomic code snippet IDE that instantly executes any C#/VB expression, statement block or program – the ultimate in dynamic development. Put an end to those hundreds of Visual Studio Console projects cluttering your source folder!