DrumSpillage 2.0.7 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This software for Mac OS X was originally developed by AudioSpillage. The software relates to Audio & Video Tools.
From the developer:
DrumSpillage is a pro-quality model based drum synth plugin for Mac OS X. DrumSpillage employs a diverse palette of technologies including elements of physical and analog modeling, additive, subtractive and FM synthesis techniques to create its drum sounds.
You may want to check out more Mac applications, such as VCode, MFilter or Aiseesoft WMV Converter for Mac, which might be similar to DrumSpillage.