Clyp - Clyp is the easiest way to record, upload and share audio. No account required.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Audio Hijack - Record any audio, with Audio Hijack!
Bigtent - BigTent is a web-based organization and communication portal for groups.
Loopback by RogueAmoeba - Get all the power of a high-end studio mixing board, right inside your Mac!
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.