Here are some credits for various assets and inspiration used on my site. I'll try to be as exhaustive as possible, but often these graphics have been in circulation for so long that I couldn't find any attribution.
All music (to my knowledge) is embedded either from YouTube or from Soundcloud. I do not take any credit for the music played here; all credit goes to the respective companies, including Jellyfish Entertainment.
All tiled backgrounds come from Sadness's page of tiled backgrounds to my knowledge.
Buttons/blinkies:
Adoptables have credits on the adopts page.