My side project is my cloud jukebox music player. I first started on it in Python about 7 years ago. About a year ago I started a C++ implementation of it and that's where my focus has been. I store my music collection in an S3-compliant object store (Wasabi, about $6/month) and I have it available to me wherever I go. I listen to my music (typically on random play) while I'm working. I have no expectation of ever making any money from it, it's something I do for my own benefit.

C++ implementation: https://github.com/pauldardeau/cpp-cloud-jukebox

Original python implementation: https://github.com/pauldardeau/cloud-jukebox