Azureus 2.4

Azureus is a Java based BitTorrent client that 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 is a BitTorrent client with multiple torrent downloads and instant access to information.

Azureus also features an embedded tracker that is easily set up and ready to use.
New Features:

Core | Logging seperated into sections
Core | Plugins can be disabled from starting up
Core | Separate high-speed transfer rates between peers within the local LAN
Core | Encrypted peer connections
Core | Revamped and much improved piece-picking code
Core | Option to bind outgoing connections to the same local port, may help with NAT router instability
Plug | HTTP webseed support
Plug | New "team seeder" plugin
Dev | Plugins can now add views/tabs to Torrent Details, Peers View, etc
UI | Draggable column reordering and column indicator (w/SWT 3.2+)
UI | Peer piece map in Peers Tab
UI | Manual tracker scrape option if auto-scrape disabled
UI | Share-ratio indicator and options to hide the various indicators
UI | Separate per-torrent options panel
Changes:

Core | Clearer firewalled/NAT status reporting
Core | Do not open the wiki NAT problem page if firewall status is OK
Core | Disk manager threads - limited pool now serves all disk read/write requests
Core | Single thread now serves torrent piece picking etc (was one per download)
Core | Persistent IP bans now have limited lifetime
Core | Reworked compact storage type to support migration of formats
Core | Less requirements to pause downloads when changing file priorities
Core | Only one torrent can now be checking at a time
Core | DHT size estimation improved
Core | Default listen port number now randomized for new installs
Core | Interrupted "seeding+checking" files now rechecked on startup