I have more ability than I have money, so one of the ways I’ve contributed to open source projects like Linux distros is by seeding linux ISO torrents.
In the past I chose rtorrent because of its small footprint and terminal UI. But development seems to have hit a wall and folks are sniffing around for a lightweight replacement. That’s how I heard about Aria2.
I was immediately skeptical but have found it useful for short-term seeding and for downloading entire torrents. It also allows you to automatically add additional trackers in the config, which I haven’t found in rTorrent. It also handles other protocols like ftp, http, etc.
rTorrent remains the winner in my book for longer-term seeding and downloading selected files in torrents.
Here is a sample of what a browser-based frontend for aria2 looks like, with downloads in various stages of completion: