AXP has released a new free VST plug-in effect for Windows:
CharBooster, a guitar booster effect, with a character.
It allows to shape, overdrive and boost the guitar signal
before hitting your favourite amplifier VST plug-in.
The effect is based on the 12ax7 tube preamp and the ATR-102
tape recorder models.
CharBooster is free and is available as a 32-and 64-bit Windows
VST effect plug-in.
AXP CharBooster - Guitar booster/overdrive effect (VST effect)