Official center for Sun Microsystems' open-source project. Wide range of information, services: documents, code, projects, contacts, fora, communities, programmer support.
Custom OpenSolaris technology; over a decade experience building Solaris and Linux systems, pioneered GNU/OpenSolaris: integration of OpenSolaris (SunOS kernel) and Open Source Software (OSS) programs. California, USA.
An operating System combining the OpenSolaris kernel with GNU application userland. Site includes downloads, documentation, community support, how to get involved, list of sponsors, and a package repository.