TSE Audio releases TSE808 - TubeScreamer Emulation for 32/64-bit OS X - VST/AU (Free)
28th March 2013
TSE808 can be used in front of an amp-sim to tighten up the low end and get some extra boost on leads.
Price: Free. It's available for Windows and Mac OS X in VST and AU plug-in formats.
KVR Audio, Inc.