A mapping application written in Java that displays Ordnance Survey maps downloaded from OS's getamap website or maps from the OpenStreetMap project. It is possible to add new map sources or extra functionality through plugins.
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.