OSM2World creates three-dimensional models from OpenStreetMap data.
The converter, started in 2009, can be used to produce output formats ranging from bitmap tiles to models for 3D modelling applications. LGPL-licensed Java source code is available on Launchpad.
GraphView helps mappers spot errors in road network data by displaying a routing graph preview.
I created the first version of this plugin for the Java OpenStreetMap editor as a part of my Bachelor thesis and have since added more features to it. It is currently maintained in the OpenStreetMap SVN repository.
The TTT software tables are a catalogue of the OpenStreetMap software ecosystem.
User-generated content is parsed by a MediaWiki bot written in Scala. A number of tables in the OpenStreetMap wiki provide different views of available programs, filtered by purpose, audience or platform.