Mastodon

Federated link aggregator. Like Reddit but decentralized, open source, and community-owned.

Social film discovery. Log, rate, and review films. Find what to watch next.

Free collaborative family tree. Single shared tree for everyone.

Collaborative family tree. World family tree project.

Conlanging tools and community. Dictionary builder, grammar documentation, and forums.

Achievements for retro games. Community-created challenges for classic titles.