Open-Source P2P Apps

Any open source P2P apps you can recommend? Anything really, torrent/file sharing/messenger...

• https://github.com/qbittorrent/qBittorrent
• https://github.com/c0re100/qBittorrent-Enhanced-Edition
• https://github.com/magic-wormhole/magic-wormhole and its GUI
• https://github.com/schollz/croc
• https://code.briarproject.org/briar
• https://github.com/session-foundation/session-android
• https://tailscale.com/
• https://www.getmonero.org/ (not a software)