Phantom Center is a stereo imager plugin that works by extracting the phantom centre from a stereo signal
Air Shelf is a plugin designed to shape your (very) high end, mostly above 10kHz. Use the Boost knob to get more highs, and the Tame knob to keep high-frequency transients under control.
A free analyzer/signal generator plugin to analyse the frequency and phase responses of any plugin (or hardware).
This plugin started as a developer tool but has been simplified so that it doesn't .....