NaviPOWM is planned to be a car navigation system capable of running on a variety of operating systems. Only OSM based map data is supported. Realtime routing engine is planned in a later version. Geocaching and city guide functionality are also planned.
Rage stands for Really Amateurish Graphics Engine. It is designed for use with multiple rendering windows such as in a Win32 MDI application. Inspired by OGRE, RAGE shares some semantics, although uses none of the code. Will help OGRE experienced users.
graphite: a portable graphics library, written in Java, JOGL and Postscript that allows rapid generation of high-quality graphs using an efficient, compact Java engine.
CAVOR is an engine for building apps that involve both graphic and text/numeric data. Primarily GIS is the initial focus, but consider also CAD, CASE, project management (eg PERT charts), and others. Built-in scripting, C API, also supports Tcl and Java.