‘baretorrent’ is an open-source, completely free, bittorrent client that runs on Windows, Ubuntu and Mac OS X. It has a simple looking and a slightly different interface (as it displays the advanced details of torrents to the right) when comparing with other bittorrent clients.
Being said that it’s simple, it still lets you change a reasonable amount of options through the ‘Preferences’ window as well. But that’s actually not its key feature, because as I put into the title, ‘baretorret’ is a natively portable tool. So can copy it into a USB flash drive and run it from there.
Update: According to ‘Jonathan’ (the developer), what he meant by saying ‘portable’ is:
When I wrote that baretorrent was “portable”, I meant “able to run on multiple platforms”, not “run from a usb key”. I understand the term “portable” is sometimes used in the latter sense.
In fact, on all platforms, configuration files are written in the user’s home directory (such as in c:\users on windows or /home/user on linux). Moving your usb key to a different computer or even using it from a different account will not keep your settings or the download queue.
I have only tested it in Windows 8 (64-bit), but according to the developer, you should be able to run it natively (without having to install anything manually) in Ubuntu and Mac OS X too.
It supports changing active connections (download/upload), manually setting a ‘seeding ratio’, changing the port number, change download/upload speeds, add a proxy, update the ‘tracker list’, change the save location anytime you want, shows various details while downloading a file (download/upload speed, percentage, size, estimated time and ‘status’), change priority and more.
Please remember that, when you click on the ‘Close’ button, ‘baretorrent’ will exit. So to make it minimize to the notification area, click on the ‘Minimize’ button instead. Windows firewall will ask for your permission for adding ‘baretorrent’ into its list when running for the fist time, so make sure to grant the permissions as well.
It is still at its ‘alpha’ stage (testing), so use it with caution, though it ran pretty smoothly while I was testing in Windows 8. If interested, then please get it from this ‘Sourceforge’ project page or, you can download it from this ‘baretorrent’ official home.
Note: I have a humble request for the developer. I think it would be better if packaging is done using a compression format that is natively supported by these operating system as for reading the ‘7z’ format, one has to install the software manually (specially concerning Ubuntu users), although it only has to be done once.