Red Gate
On 1 February 2011 Red Gate announced that .NET Reflector would become a commercial product as of version 7, which was released on 14 March 2011. This led to the creation of several free alternatives, including dotPeek, CodeReflect and the open source program ILSpy. Subsequently, on 26 April 2011, due to community feedback Red Gate announced that they would continue to make .NET Reflector 6 available for free to existing users (while new users will have to pay for Reflector).