Deluge

Deluge is a free, open-source BitTorrent client that runs on multiple platforms and is written in Python. It uses a client-server architecture, where a background service (daemon) manages torrent activity, and users can interact with it through various types of interfaces, such as a desktop GUI, web interface, or command line. Deluge is praised for its minimal system impact and flexible design.

Key Features:

• Client/Server Architecture:
  Torrent operations are managed by the Deluge daemon, which runs independently in the background. Users can control it through different client interfaces.
• Multiple Interface Options:
  Deluge supports a GTK graphical user interface, a web-based interface, and a command-line client.
• Lightweight Performance:
  Built to use minimal system resources, Deluge runs efficiently even on low-powered or older systems.
• Extensive Plugin Support:
  A robust plugin system allows users to enhance Deluge with added features like speed control, file prioritization, and more.
• Protocol and Feature Support:
  Includes support for technologies like DHT (for peer discovery), magnet links (for quick torrent access), and UPnP (for automatic port configuration).
• Free and Open Source:
  Deluge is completely free to use and its source code is publicly available for anyone to inspect, modify, or contribute to.