Electric Keys is a a cross platform software keyboard with 50 classic and vintage sounds.
This is giant sound library goes above 40GB with over 20,000 samples recorded at 24-bit 96kHz quality. It carries various legendary electric pianos, organs, wurlizers, clavinets, tape samplers, string machines, keyboard basses and even some exotic electric keyboard instruments.
Aside from its wide array of sounds, this program comes with its own virtual effects rack which includes Reverb, delay, chorus and amp simulation. You have a 256-note polyphone per instrument, low latency and quick disk streaming.