'''SPIM''' (MIPS spelled backwards) is a MIPS R2000 and R3000 simulator generally used to educational purposes. It has a commandline version, and graphical front-ends from Windows and Linux, PCSpim and <code>xspim</code>, respectively. The source code for SPIM was released in 2010 under the standard BSD license.

* [http://www.cs.wisc.edu/~larus/spim.html SPIM homepage]