List of Top Free Open Source & Self Hosted Application for File Transfer - Peer-to-peer Filesharing

Peer-to-peer file sharing is the distribution and sharing of digital media using peer-to-peer (P2P) networking technology.

bittorrent-tracker – Simple, robust, BitTorrent tracker (client and server) implementation. MIT Nodejs
Dat Project – Powerful decentralized file sharing applications built from a large ecosystem of modules. MIT Nodejs
exatorrent – BitTorrent client written in Go that can be run locally or hosted on a remote server, and supports streaming via HTTP. GPL-3.0 Go
instant.io – Streaming file transfer over WebTorrent. MIT Nodejs
qBittorrent – Free cross-platform bittorrent client with a feature rich Web UI for remote access. GPL-2.0 C++
Send – Simple, private, end to end encrypted temporary file sharing, originally built by Mozilla. (Clients) MPL-2.0 Nodejs
Transmission – Fast, easy, Free Bittorrent client. GPL-3.0 C