Facebook last week launched its Incubator on GitHub in order to distribute its own open source software projects. Incubator serves as a testing ground for new open source projects from Facebook, which has open sourced almost 400 projects to date. New projects will be posted on Incubator pages to gauge community reaction and rate of adoption. To make the cut, projects have to get community pickup, have good documentation, be easy to integrate with other tools, and show good engagement between Facebook and the community.