Deluge version 2.2 is an open-source, cross-platform BitTorrent client built on libtorrent and the Twisted framework, offering interfaces such as GTK, a web interface, and a console variant. The source code is written in Python and distributed under the GPL license. Deluge operates in a client-server mode, allowing the daemon to run on a remote machine. Key features include support for DHT, UPnP, NAT-PMP, PEX, LSD, protocol encryption, proxy support, selective speed limiting, and sequential download mode. The update introduces support for creating torrents in the BitTorrent v2 format, enhancing security with SHA2-256 and improving efficiency with a Merkle hash tree. The GTK interface now includes light and dark themes and a system tray indicator, while the web interface supports theme switching. Support for Python 3.6 has been removed, with Python 3.7 as the minimum supported version. Additionally, qBittorrent version 5.1 was released on April 27, 2025, as an open-source alternative to µTorrent, with its source code available on GitHub under the GPLv2+ license.