Free Plugins
Synths
- Surge XT: Versatile synth (FOSS)
- Vital: Wavetable synth with many similarities to Serum (FOSS GPL)
- Odin 2: Rough clone of Thor from Reason (FOSS)
- DSP56300 (emulator is FOSS, actual ROM's are proprietary)
- Synth1
- Full Bucket
- Geon Kick
- U-He Free Synths Tyrell, Zebra CM, Bazille CM, Zebralette
- Spectral Plugins Released their three plugins Pancz, OCS and Spacer after closing down their business.
EQs and Compressors
- Tokyo Dawn Labs as some good free EQ's and compressors.
- ZL Equalizer 2 is a kind of free clone of Pro-Q. Open Source
- Dusk Audio Multi Q has three different EQ's (Modern digital, British console presumably SSL 4K, and tube presumably something like a Pultec) integrated into one.
- Multi Comp multiple compressor models, again by Dusk. Do check out the rest of Dusk's plugins too.
- Sage Audio has a list of free EQ's