tileFoundry is an isometric map editor that is being developed for a game. It reads and writes XML files, uses PNGs for tiles, and has been developed with a focus on ease of use. It features a GTK 2 GUI and uses SDL for the map engine.
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.