Habitica wraps habits, dailies and one-off to-dos inside a role-playing game: finish something real, earn experience and gold, level the avatar up, and join party quests where a slacking teammate costs everyone health. Core features stay free and the code stays open.

A free expense tracker for Android, iOS and the web, built by an independent developer and published with its code visible. It offers five ways to sync, from the system cloud to WebDAV, S3 or a self-hosted backend, so the ledger lives on storage you picked rather than on someone else's server.