Antti @ Smart Electronix has released a virtual recreation of the famous 70s Moog Taurus bass pedal synthesizer used by such bands as Led Zeppelin, Rush and Genesis.
"The sound of the Taurus is legendary… thick and fat with pulsating detuned oscillators and, of course, that famous Moog sound. The actual Taurus preset is a classic – it has a moderately bright attack which decays to a deep, powerful and solid sustain…. it is just about the perfect bass sound for adding weight to a track." Moog Taurus review at Hollowsun
The VST Taurus is free to download (donationware) from the Antti webpage where you can also check out some audio examples and other VST plugins. If you need host software see my post on Freeware Portable VSTi Hosts for a quick fix.
Moog Taurus Resources
The MOOG Taurus Appreciation Society a short guide to the instrument.
Moog Zone a list of resources for all types of Moog products.
Taurus Mk1 Hardware VSTi Plugin GUI