Not a good programmer, but I've been writing documentation improvements for a few projects I use in my free time. I'm doing it for kopia currently as the documentation for that project is not great at the moment.
Kopia is a deduplicating backup application similar to BorgBackup and Restic, written in Golang by a former google engineer. It creates infinite incremental backups, has encryption and compression, and works with S3, B2, SSH, or a local filesystem.