The Icicle Session is a free sample collection based on sampled icicles.
Creator Kent Williams explains:
Last winter I went out and tapped on icicles hanging down from our eaves over the front porch. And apparently I cut it up into a sample set and didn’t do anything with it. These I release into the public domain. Knock yourself out.
The collection has a limited focus, but includes some unique percussive sounds.
Using Chains and automation to switch keyboard setups
Eurorack module puts General MIDI sound set under creative CV control