Launching Next has discovered 5 opensource startups.
Amidanote
simple online note for developers
Meshcloud
Open-Source Cloud Platform for Companies and Professionals
Beerpay
Way to support Open Source Porjects
Buddycloud
Easy tools make easy community.
www.centos.org - The Community ENTerprise Operating System
CentOS -- Community ENTerprise Operating System is a free rebuild of source packages freely available from a Prominent North American Enterprise Linux vendor.