Pagex is a absolutely simple bolt-on content management system with search engine optimisation features built in. It consists of a few laid back files that do what they need to when they need too. Simple SEO CMS.
3store is an RDF "triple store", written in C and backed by MySQL and Berkeley DB. It is an optimisation and port of an older triple store (WebKBC). It provides access to the RDF data via RDQL or SPARQL over HTTP, on the command line or via a C API.