Mumble Low-latency, high-quality voice communication for gamers

Low-latency, high-quality voice communication for gamers. Includes game linking, so voice from other players comes from the direction of their characters, and has echo cancellation so the sound from your loudspeakers won't be audible to other players.

Download here:  Mumble

Features

• High quality, low latency Voice communication
• Multi-platform
• Efficient server software
• Free and Open Source - no hassle before or after setting up
• Powerful API through Ice middleware - for numerous programming languages
• Positional Audio in games - hear your teammates from the direction they stand in
• In-Application Overlay - see who is listening and talking in-game

Download Ares Galaxy

Ares is a free open source bittorent and chat program that enables users to share any digital file including images, audio, video, software, documents, etc. You may now easily publish your files through the Ares peer to peer network. As a member of the virtual community, you can search and download just about any file shared by other users. Latest versions also support internet radio stations. With Ares you can join chat rooms or host your channel and meet new friends.

Download here: Ares Galaxy

Ares Galaxy is an open source peer-to-peer file sharing application that uses its own decentralized supernode/leaf network. Ares Galaxy has a simple, quick access interface with a built in audio/video viewer. The latest versions also support the BitTorrent protocol and Shoutcast radio stations.