Moles - an isolation framework for Microsoft .NET
Typemock Isolator is a mocking framework used in unit testing .NET and unmanaged C and C++ code.
"Moles is more often compared contrasted to typemock in that it offers a set of facilities outside of moq and or rhinomocks sweet spot"
from question "Why would I select Moles as my mocking framework?"
"I have no concrete figures on that but from my own experience i d estimate that instrumented tests are around 100-400 slower typemock seeming to be faster than ms moles"
from question "Are Using Interfaces Soley to Facilitate Stubing and Mocking in Unit Tests Now Obsolete?"