Humanoid Sound Systems has released the free Enzyme Player. The only condition is you must sign up for their newsletter, which is distributed every two weeks at the most and contains news, offers and freebies.
Enzyme Player contains the complete synthesis engine from the full Enzyme synth, and has all the essentials for music creation (access to all of the parameters, and the saving of presets is only available with the full version).
The synth uses a unique combination of wavetable and physical modeling synthesis to create rich, dynamic musical timbres. Hybrid Scanned / FM synthesis is also on offer for even more sonic possibilities.
The video below was created by Computer Music magazine using Enzyme CM which shares Enzyme Player's feature set exactly: