YAuCP is a collection of tools for uC (micro-controller) development. It's designed mainly for AVR uControllers and aims to develop almost every part of the development chain, ranging from software tools to hardware designs.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.