At the beginning of the T4E project there was the plan to write
a crossplattform Map Editor using SDL and FLTK.
The basic idea behind this was to have a Leveleditor
that everybody, who works at the game, could design
Level with, whatever system they use.
But soon we realized that it would be too much work
to code a really good editor. There were lots of bad ones
around.
The current state is that we use TileStudio on Windows
(
http://tilestudio.sf.net
) I
coded an importer to load
Maps from TileStudio into my own Map Format.