evilrpg
plugin-based RPG manager in C++ and Qt5
... planned include a 3D mappiing capability using the Unreal Engine and initiative/effect tracking. Plugins may be under a different license than the base application, depending on the plugin.
evilrpg itself is going to be under the BSD license supporting Windows, Linux, and (hopefully) Mac. Support is also planned for Android, and possible IOS if the community supports it (code is portable).