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The qBittorrent project aims to provide a Free Software alternative to µtorrent. Additionally, qBittorrent runs and provides the same features on all major platforms (Linux, Mac OS X, Windows, OS/2, FreeBSD).

µTorrent is a lightweight BitTorrent client that includes standard features such as bandwidth prioritization, scheduling, RSS auto-downloading and Mainline DHT. Additionally, µTorrent supports the Protocol Encryption joint specification and peer exchange.

Deluge is a full-featured BitTorrent client for Linux, Unix and Windows. It is written in python, uses libtorrent (rasterbar) at its core and GTK for the main user interface along with web and console interfaces for advanced client/server facility.

Clean, adware free installers: https://board.jdownloader.org/showthread.php?t=54725

Tixati is a peer-to-peer file sharing program that uses the popular BitTorrent protocol. This protocol allows many peers to form a cooperative swarm and download very large files with great efficiency.

Internet Download Manager (IDM) is a tool to increase download speeds by up to 5 times, resume and schedule downloads. Comprehensive error recovery and resume capability will restart broken or interrupted downloads due to lost connections, network problems, computer shutdowns, or unexpected power outages. Simple graphic user interface makes IDM user friendly and easy to use.Internet Download Manager has a smart download logic accelerator that features intelligent dynamic file segmentation and safe multipart downloading technology to accelerate your downloads. »

FrostWire is a free, open source P2P BitTorrent file sharing application & cloud file downloader in one. It's a fork of LimeWire .

FreeRapid Downloader is a simple Java downloader that supports downloading from Rapidshare and other file-sharing services.Main Features: support for concurrent downloading from multiple services, downloading using proxy list, download history, smart clipboard monitoring, automatic checking for file's existence on server, automatic plugins updates, simple CAPTCHA recognition, works on MS Windows, Linux and MacOS, easy to use, looks amazingly, simply works!

pyLoad is a fast, lightweight and full featured download manager for many One-Click-Hoster, container formats like DLC, video sites or just plain http or ftp links. It aims for low hardware requirements and platform independence to be runnable on all kind of systems. (desktop pc, netbook, NAS, router)

BitComet is a BitTorrent/HTTP/FTP download management software, which is powerful, and easy-to-use. It contains many advanced features that can accelerate your downloading up to 5 - 10 times faster, or even more.

BiglyBT is a feature filled, open source, bittorrent client based on the Azureus open source project, now Vuze .

CuteTorrent is a lightweight BitTorrent client with a simple, intuitive interface designed to quickly download and share torrent files. At the heart of it’s core resides the powerful libtorrent BitTorrent library.