After all the years we get used to use .NET Reflector for free and I personally realy on that as last line of defence to see what is going on in the code. On Feb 2011, RedGate did an annoucement that the tool cannot be available free anymore. Thats a unfortunate.
But luckily, SharpDevelop team took the challenge and build something similar. They calls the tool ILSpy and it really does a good work for me.
Find it out on: http://wiki.sharpdevelop.net/ILSpy.ashx
And check the screenshots for compare with original Reflector.
have a good fun with the new free tool.