JetBrains发布了一款免费的.NET反编译器dotPeek

Free .NET decompiler :: JetBrains dotPeek

主要的功能：

1. Decompiling .NET 1.0-4.5 assemblies to C#
2. Exporting decompiled code to Visual Studio projects
3. Support for downloading code from source servers
4. Quick jump to a type, assembly, symbol, or type member
5. Effortless navigation to symbol declarations, implementations, derived and base symbols, and more
6. Accurate search for symbol usages with advanced presentation of search results
7. Overview of inheritance chains
8. Syntax highlighting
9. Complete keyboard support
10. dotPeek is free!

试用了一下，有很多快捷键和resharper一样，所以可以比较方便的跳转。

不过我发现了一个bug，比如对dllimport的代码，没有生成 extern 关键字，这点就不如ILSpy了，ILSpy可以很正确的反编译我试用的这个dll。而且ILSpy还是开源的。