Wikipedia
OpenIndiana
OpenIndiana is a free and open-source, Unix operating system derived from OpenSolaris and based on Illumos. Developers forked OpenSolaris after Oracle Corporation discontinued it, in order to continue development and distribution of the source code. The OpenIndiana project is stewarded by the illumos Foundation, which also stewards the Illumos operating system. OpenIndiana's developers strive to make it "the defacto OpenSolaris distribution installed on production servers where security and bug fixes are required free of charge".