Yocto Project

The Yocto project is a set of tools that allow someone to build and use an embedded Linux image.

From the Yocto web site: The Yocto Project is an open source collaboration project that provides templates, tools and methods to help you create custom Linux-based systems for embedded products regardless of the hardware architecture.

The main web site is at: http://www.yoctoproject.org/

History
The Linux Foundation announced the Yocto Project in October, 2010 at Embedded Linux Conference Europe 2010

Yocto technology derives from Poky Linux, which was a branch of Open Embedded