Tired of querying in antiquated SQL? Well, you don't have to! 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 SQL
* LINQ to Objects
* LINQ to XML
LINQPad is also a terrific tool for learning LINQ: it comes preloaded with 200 examples from the recently released C# 3.0 in a Nutshell. There's no better way to experience the coolness of LINQ and functional programming.