The freesound bundle is a collection of vst/rtas/au, mac/windows plugins that i have developed while teaching at UCSD and CalArts.
+chebyshev
a distortion unit which uses various low-order chebyshev polynomials to add even or odd harmonic distortion.
+compand
+compand is a combined compressor/expander plugin. It has a softknee control as well as a switchable rms/peak level detector.
+decimate
bit depth and sample rate reduction for added aliasing and decimation noise. a very noisy plugin.
+matrix
a mid-side to left-right encoder and decoder. for mid-side microphone arrays, but also useful when needing to apply effects to only the center or the sides of a stereo mix.
+phasescope
the standard studio tool for seeing the phase relation between your left and right channels. also includes a bit meter.
The file includes Mac VST/RTAS/AU (10.4+) and Windows VST/RTAS (XP+)