Wagner Sharp – tube guitar preamp emulation plug-in for Windows (VST 32 and 64bit) and Mac OS X (VST and AU 32 and 64bit).
Wagner Sharp features :
– 64-bit floating point processing
– All sample rates support
– Two channels (stereo mode to be able to handle double tracks). Each channel is activated when there is a signal at its input, which saves CPU resources
– Up to 64x oversampling (depends on the host sample rate)
It’s free but donations are welcomed.