Gate Effect: Cableguys - VolumeShaper VST

VolumeShaper from the Cableguys is a gate effect VST plugin for Windows, that allows detailed modulation of a signal's volume.
Until the beta is over you can buy the plugin for 15 dollar, after that it's 20 USD. There is also a demo version available for download.

"You can draw in any volume curve you like shaping hard-synced or analogue-sounding rhythms. Create interesting rhythmic strings, shape a bass sound, destroy vocal recordings, create vivid shaker rhythms out of high-passed white noise, .. You can change all parameters via automation (if your host sequencer can handle it). Everything. Choose which wave is in use at any position in your song, change the loop length, record and play back any point movements and assign any hardware controller to any parameter in VolumeShaper. Even with heavy modulations, with tempo changes in the host or jumping at different positions of a song, the modulation always stays in sync." Via