Wicker is a modified version of Ubuntu designed to boot from USB flash on an embedded device for use as a digital photo frame or as a Web-connected digital sign.
It was developed as an open source project by RedPost for their Web-based Corktop digital sign management software.
TouchableViews is a simple GUI library for embedded systems. It is intended to be used in applications that are simple enough to not require an operating system or a full-featured GUI library, and is well suited for small touch panels.