Here you can find links to freeware & FLOSS VST-s. All links lead to official websites. Please note that i am not affiliated with developers of these plugins.
Compressor Xfer OTT --- Licensed as: Freeware. Available for Window$ & Mac (also for GNU+Linux via Wine).
Vital spectral warping wavetable synthesizer (it's kinda better than Serum) --- Has optional paid presets, available for Window$, Mac & natively runs on GNU+Linux, licensed as:
GPLv3 Free/Libre Open-Source Software (source code on Github)--- Free download, Vital audio account is required for a binary installer ---
Cyan skin by Outer Lives (Google Drive Link)
TDR Nova (equalizer plugin) --- Licensed as: Freeware. Available for Window$ as no-install, available for Mac as a .pkg package. Also available for GNU+Linux via Wine.
Krush (bitcrusher) --- Licensed as: Freeware. Available for Window$ & Mac. Also available for GNU+Linux via Wine.
Graillon2 (pitch correction/auto-tune) --- Has an optional paid version, Licensed as: Freemium. Available for Window$, Mac, GNU+Linux via Wine.
Astrofox (Audio visualization software) --- Licensed as: MIT. Available for Window$, Mac, and natively runs on GNU+Linux.
Astrofox source code on Github
