KTGranulator is a free delay line granulator available as a VST effect plugin.
A plug-in suite that includes a Compressor/Limiter, Expander/Gate, and De-Esser.
A plugin containing DSPs for differentiation and integration.
It is a high quality reverb for everyday use in a professional studio.
MReverb is special reverb designed for mixing, particularly spatial positioning
More Feedback Machine is a good tool for Audio Units UB.