Adding two free SFX packs to the list:
- Essential UI SFX: 150 interface sounds, 5 versions of each event.
https://willosuna.itch.io/essential-ui-sfx - Magic Spells SFX Lite: 30 spell sounds for spooky magic.
https://willosuna.itch.io/magic-spells-sfx-lite
WAV + OGG, synthesized from code (no recordings, no samples), free for commercial use, no credit required.