Flexlay is a generic 2d editor framework with special focus on games. It is written in Python3 and uses Qt5. It currently supports multi layered tile-, object- and bitmaps, full undo/redo, support for tile-brushes, easy copy/paste, multiple buffers, minimap support, a metadata editor and some other stuff usefull for creating levels for 2d games.
Supported games:
Since Flexlay is a framework and not an editor itself, it has to be started via a game specific script (e.g. supertux-editor, netpanzer-editor).
To run the SuperTux version of Flexlay, see the wiki.
Flexlay is covered under the GNU GPL, which means that you can copy and even modify it pretty much as you like, as long as you keep the copyright headers in place and distribute the source too if you distribute binaries, see the file COPYING for details.