Apps Related to ActivityPub Support

Funkwhale is a free and open-source, self-hostable platform for sharing music. It's a decentralized, community-oriented alternative to commercial music streaming services, built on ActivityPub for federation and offering features like music streaming, library management, playlists, and podcast support.

Musteus is a decentralized, privacy-focused social media platform designed for secure and controlled social networking and communication. It supports self-hosting and integration with other platforms, offering a robust alternative to mainstream social networks.

BuddyCloud is a secure and decentralized messaging and social networking platform designed for both individual users and organizations. It provides a rich set of tools for real-time communication, group discussions, and content sharing, prioritizing privacy and user control.

Libertree is a free, libre, and open-source software platform designed to empower individuals and groups to create their own decentralized social networks. It offers a comprehensive suite of communication and community-building tools, prioritizing user control, privacy, and freedom of expression.

Identi.ca is a free and open-source decentralized social networking and microblogging service built on the pump.io software and Activity Streams protocol.