Gater is a free gate VST, Audio Unit plugin developed by SPC Plugins. Compatible OS(s): Windows 64b, macOS.
Gater is a simple 16th-note (semi-quaver) gate sequencer or ‘trance’ gate. It features an easy to use GUI with a handy randomize feature to invent new gate patterns. Two click-free gate shapes are available. The Gater uses very little CPU power or screen space and is compatible with VST 2.4.
http://www.spcplugins.com/