From iA wiki
A proprietary, decentralised, P2P client which features multi-source downloads, chat and an internal audio/video player. Ares used to be based on the Gnutella protocol but has subsequently developed it's own file transfer method.
This program may contain spyware and is also known as Ares Galaxy. Ares popularity is increasing, in part, due to its simple interface. By late March 2004 Ares had up to 300 000 users regularly sharing information.