BitComet
BitComet is the most popular BitTorrent, HTTP, and FTP client that helps you make the most out of the BitTorrent protocol. It comes intending to deliver high download speeds with a reasonable impact on the system resources. The application is the top player in this particular category, and also it still struggles to meet the highest user expectations.
Unlike most other similar BitTorrent clients, it comes with some new features and tools, and the main objective is to download files at very high-speeds, and it achieves this successfully. BitComet offers quite a simple and easy to understand interface and provides features such as multi-mirror, multi-section downloading, quick resume, bandwidth scheduler, and a dedicated tool to shut down the computer until the download is completed.
One of the most appreciated facts of this client is that it enables you to arrange the first and the last segments of files, so you can preview them before downloading is completed. BitComet also has a feature that allows you to easily configure settings related to the proxy, long term seeding, download task and integration with internet explorer, etc.
#1 Deluge
Deluge is the most leading BitTorrent client for Windows, OS X, Linux, and Unix operating systems. It is a feature-rich solution and uses libtorrent in its backend and offers multiple user-interfaces, including web and console. This BitTorrent client is specially designed using a client-server model with the daemon process that handles all the major BitTorrent activities.
Deluge aims to be a secure and lightweight client, and most of its features are part of plugin tools that were written by various developers. The client is capable of running on headless machines with the user-interfaces being able to connect remotely from any platform at all times.
Its other prominent feature includes rich plugin collection, simple, fast, and secure, operates in GNOME, XFCE, KDE, and lots of other similar platforms, etc. Deluge is a 100% free software and is licensed under the GNU General Public License.