The distribution is the result of work by developers from the OpenZaurus, OpenEmbedded, and OpenSIMpad projects.
The graphical user interfaces (GUIs) available are OPIE and GPE among other options.
The Ångström distribution is in "competition" with Poky Linux[2] which is now part of the Yocto Project.
Ångström is based on the OpenEmbedded project, specifically the OpenEmbedded-Core (OE-Core) layer.
While both Ångström and Poky Linux are based on OE-Core, mostly utilize the same toolchain and are both officially "Yocto compatible", only Poky Linux is officially part of the Yocto Project.