MapForge is described as 'Map-making software for creating tactical-scale top-down battlemaps for RPGs, with a large library of ready-to-use mapping content Add-Ons (including 50 free ones!). Also works with your own artwork/bitmaps, via drag-and-drop' and is a role-playing game in the games category. There are more than 10 games similar to MapForge for a variety of platforms, including Web-based, Windows, Mac, Linux and Self-Hosted apps. The best MapForge alternative is Tiled Map Editor, which is both free and Open Source. Other MapForge like games are LDtk, MMapper, MapperMate and OGMO Editor.
It's not even map-making software.