Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
foobar2000 - An advanced freeware audio player for the Windows platform.