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.