SFX Machine RT ($99.99) is a multieffects plug-in (VST for Windows and OS 8/9/X, AU for OS X) that comes with hundreds of presets ranging from conventional effects (such as choruses and flangers) to more out-there options like “Munchkin Chorus” and “Freeze Boing Discrete.” Cool features include automated parameter control via a MIDI learn interface, and a Randomize button that lets users explore the preset possibilities. Version 1.04 claims improved Audio Unit functionality and enhanced stability.