web client

Folx is a simple yet powerful download manager and torrent client for Mac OS X.

Internet email client.

Icecast2 client to broadcast an Internet radio program.

Email client from Mozilla.

Robust email client from the makers of BBEdit, now free.

Fast and reliable FTP client.

Chat client for teams and small businesses.

Mac client for Lync users.

Official Twitter client for Mac (was Tweetie).

The free usenet NZB download client.