All the Waves, NI, Soundforge plugins and so on...
- SX, Wavelab, Ableton live, Nuendo,...
All the VSTi's you can get....
And if you really want to have quality sound whitout losing the grip out of your PC, use a Firewire TLaudio Powercore.... The plugin whit this baby are awsome... Or just use real Reverb units like Lexicon or TL Audio...
cheers