Flutterbird is a free, open-source effect plugin for adding pitch and volume fluctuation to incoming audio. It can be used for traditional wow/flutter effects as well as more chaotic, extreme

Cocoa Delay is a free, open-source delay plugin in VST format. It focuses on clean design, easy operation, and a warm, lively sound. Notable features: – Delay time drift, for

Tesselode releases Mika Micro for free. Mika Micro is a subtractive synthesizer plugin that aims to be fun and expressive with a minimal set of controls. Features: – 2 oscillators