well, i'm about to share a synth that takes lots of stuff from different peoples' works...and i have tried to credit them where i could, but sometimes it's hard to remember who made what patch.
and i was thinking about what to do about crediting others..
and i came to these conclusions: credit when possible, but if you forget someone don't worry too much - they'll get in touch if they are worried. most important is to share your works.