NeoLoader!

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.

DownThemAll (or just dTa) is a powerful yet easy-to-use Mozilla Firefox extension that adds new advanced download capabilities to your browser. DownThemAll lets you download all the links or images contained in a webpage and much more: you can refine your downloads by fully customizable criteria to get only what you really want.

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.

PicoTorrent is a tiny BitTorrent client for Windows with low memory usage, high performance and a native user interface. No ads, carefully selected features, and a native user interface integrating seamlessly with your desktop.

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)

Mipony, is a free software specially designed to download easily files from free hosting pages like Rapidshare, Fileserve, Hotfiles and many others.

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