Ace of Spades is a free software synthesizer preset pack for Ace, made by Sonus Dept..
Ace of Spades is a free sound library for U-he ACE.
Ace of Spades features 40 presets able to fit different music genres. A careful selection of powerful basses, deep pads, sound FX, industrial percussions and many more can find its way in your next EDM hit as well as in your experimental soundtrack. Each preset has a brief but informative description of the sound you can get from it and suggestions on how to use it.
http://www.sonusdept.com