Multiply is a free Chrous VST plugin that is available for Mac and Windows. Multiply is developed by Acon Digital and built to be a versatile chorus effect and does more than just produce a chorus.
Each voice or sound that is sent is processed through a randomizing filter, which makes the output less dusty or robotic.
The plugin is able to produce up to 6 different voices and each of the voices can be controlled for pitch and volume. One of the coolest parts of the plugin is that it also comes with an inbuilt EQ which is really helpful to avoid overlaying another EQ. The plugin also offers so much control.