T2 is an open-source system development environment (or distribution build kit if you are more familiar with that term). T2 allows the creation of custom distributions with bleeding-edge technology. Currently, the Linux kernel is normally used, but the project is expanding to Hurd, OpenDarwin and OpenBSD. T2 started as a community driven fork from the ROCK Linux Project with the aim to create a decentralised development and a clean framework for spin-off projects and customised distributions.