Free torrent portal software for linux

GSTorrent is a Bittorrent client/server system. A daemon program handles all the file transfers as a Bittorrent client. The GSTorrent daemon also acts as a server for an external GUI client.
The objective is to have a relatively small Bittorrent client, which runs on a small computer without a graphical interface and to control this server from a different machine.
An example of this type of architecture is the mldonkey client/server system for the edonkey protocol.
Enhancements:
- The torrent hash problem is fixed.
- The upload/download rate settings finally work correctly.
- A better torrent selector.

Azureus offers multiple torrent downloads, queuing/priority systems (on torrents and files), start/stop seeding options and instant access to numerous pieces of information about your torrents.

Azureus has now features like an embedded tracker, that is easily to set up and ready to use.

Hyperic HQ project is a distributed infrastructure management system whose architecture assures scalability, while keeping the solution easy to deploy.

HQs design is meant to deliver on the promise of a single integrated management portal capable of managing unlimited types of technologies in environments that range from small business IT departments to the operations groups of todays largest financial and industrial organizations.

qBittorrent is a bittorrent client written in C++ / Qt4 using the good libtorrent library (By Arvid Nordberg).
qBittorrent aims to be a good alternative to all other bittorrent clients. The Author is Christophe Dumez, French Student in computer science (IT).
Main features:
- Fast resume of unfinished downloads on startup (no need to recheck files)
- Unicode Support
- Connection through proxy server support
- Download only some files within a torrent
- Scan regularily a folder and add automatically torrent files within to download list
- Drag n drop of torrent files to GUI
- Limit Upload / Download Speed
- Limit number of simultaneous connections
- User can set share ratio
- UDP Tracker support
- IP Filter support
- Display number of peers, complete / partial sources for each download
- Languages supported: English, French, Simplified Chinese, Spanish, Korean, German, Catalan, Polish, Dutch, Turkish, Greek, Russian, Swedish

KTorrent is a BitTorrent filesharing program for KDE.
Main features:
- Downloads torrent files
- Upload speed capping, seeing that most people cant upload infinite amounts of data.
- Internet searching using The Bittorrent websites search engine
- UDP Trackers
It has only been tested on linux at the moment, but it should work on most, if not all unix platforms.
Enhancements:
- This is a bug fix release for the 2.2 version. The most notable bug it fixes is the file selection.

NRPG Ratiomaster is a small standalone application which fakes upload and download stats of a torrent to almost all bittorrent trackers.

This means that it does NOT rely on your bittorrent client (uTorrent, Azureus, etc.) and it will NOT download/upload the files on a torrent - it only can fake download/upload.

The application has hardcoded emulations for the most commonly used BitTorrent clients: uTorrent, BitComet, Azureus, ABC, BitLord, BTuga, BitTornado, Burst, BitTyrant, BitSpirit.