Tile Studio: development utility for graphics of tile-based games
tilestudio.sourceforge.net
tilestudio.sourceforge.net
As for interesting features the program offers on its own… it has a pretty decent integrated graphic editor for tilemaps [4], and uses a template language for defining the output format instead of providing a generic parsable file format [5]. It also appears to abstract away layers by making each tile in your map consist of a "front," "middle," and "back" tile [6]. In general, it seems like a more old-school version of Tiled, and may be useful for people developing for/on older systems that want a very lightweight tilemap editor.
For people used to programs like Tiled, though, there's probably no compelling reason to switch to this tool. The lack of a working undo function in the map editor could be a dealbreaker, for one.
[1] http://cleangl.sourceforge.net/index.php
[2] http://clean.cs.ru.nl/Clean
[3] http://cleangl.sourceforge.net/thesis/
[4] http://tilestudio.sourceforge.net/drawing.html
Each color can be set to a tile, and you can read in the bitmap easily to load a level. A fun way to quickly crank out maps.
I used it to draw art which was converted to bitmaps, define polygon shapes for Box2D bodies, define joints between shapes (rope/spring/hinge), select static/dynamic properties, assign mass/restitution/friction...
And that was years ago, so I wasn't looking forward to going through that process again.
I wish more software in general allowed you to freely define your output format.
pyxeledit.com/
https://news.ycombinator.com/item?id=6696691
edit: semi-freshly re-written in C++ according to the blog
(A good way to find the best open source product for X in the world is probably to post a link to a bad product for X here.)