The Samplebase Web site offers a free sample-playback synth engine called Satellite Pro. Exclusive for Samplebase users, Satellite Pro is available as a VST/AU plug-in and as a standalone player.
Satellite Pro loads REX, WAV, and Acid files, and includes features such as automapping, a sample editor, batch processing, a patch editor with three ADSTR envelopes, an effects module, and more.
Through November 11, 2007, Satellite Pro can be downloaded for $99. After that date, Satellite Pro can be had for the regular price of $149. Check it out at www.samplebase.com.