Transient

Audio Assault has released Transient, a free Envelope Shaper plug-in for VST/RTAS/AAX on Windows and VST/AU/RTAS/AAX on Mac OS X.

Increase the attack of a snare, highlight picking on an acoustic guitar or smash a drum room.

Use the x2 switch to double the intensity of the effect.

http://audio-assault.com/downloads.html