Same [1], but I'm considering deleting it, as most of them are shit anyway. After seeing Assembly die in less than 2 years [2], I filtered my side project ideas through a "do you see this running in 10 years?" filter, and I saved them as bookmark folders [3].
cask.space: website for brew cask packages - categories, info, screenshots, discovery, etc.
"deep" ai: strong artificial intelligence - more of a career goal than a side project
docsite: simple, standardized landing pages for doctor's offices, á la jameda or zocdoc
games: tons of game dev resources and indie game websites - if I ever find time to work on one, I love game development
peer interviews: p2p pair mock interviewing for interview practice - an interest of mine (github.com/andreis/interview)
sidelog: a tool to organize [ideas for] side projects + collaboration
1: https://github.com/andreis/ideas
2: https://webcache.googleusercontent.com/search?q=cache:wUe7XO...
3: here they are