Here you'll eventually find all kinds of stuff, but importantly, I'll be trying to put any js doodads I make over here with some tutorialization if possible.
If you use my code I'd prefer you give credit somewhere (linking back to here or the main site), but code is code. I'm just happy to give people cool things to put on their websites.
The code for the cursor you can find over on Beat's Game Recs. It's a simple cursor trail with some adjustable bits.
A cursor effect that has a set of paw prints following behind! Uses a particle system and uses some of the weird bits of canvas drawing.