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. It was founded in 2010 as a collaboration among many hardware manufacturers, open-source operating systems vendors, and electronics companies to bring some order to the chaos of embedded Linux development.
As an open source project, the Yocto Project operates with a hierarchical governance structure based on meritocracy and managed by its chief architect, Richard Purdie, a Linux Foundation fellow. This enables the project to remain independent of any one of its member organizations, who participate in various ways and provide resources to the project.
Why use the Yocto Project? It's a complete embedded Linux development environment with tools, metadata, and documentation - everything you need. The free tools are easy to get started with, powerful to work with (including emulation environments, debuggers, an Application Toolkit Generator, etc.) and they allow projects to be carried forward over time without causing you to lose optimizations and investments made during the project’s prototype phase. The Yocto Project fosters community adoption of this open source technology allowing its users to focus on their specific product features and development.
以上，是从官网拿来的，已知的，从它上面发展来的系统有Mentor Embedded Linux，Wind River Linux等，还有freescale一些板子上的 demo 系统也是基于它的。
https://www.yoctoproject.org/