Here's two decent ones I've found:
This allows you to make pattern, palette, and color data for a tile map editor. This creates tiles for graphics mode 2.
VScreen Level Editor:
This is a tilemap editor. This can use the raw output of Polka to build tilemaps.The tilemap exported is based on the dimensions of the tilemap. For example, a 1x1 tilemap (1 screen wide and tall) is exported to 768 bytes.
There is some work that needs to be done. The raw output of Polka has to be combined. In Windows you could use:
copy /b Tiles.pal+Tiles.pat+Tiles.col Tiles.sc4
It wouldn't be hard to make a simple program to write the 32 bytes of the palette, the 2048 bytes of the pattern and the 2048 bytes of the color map to a single file.
VScreen can also store additional information, such as sprite positions. I haven't looked into extracting this information. The formats are documented, and available on the VScreen manual page:
The sprite stuff is useless, as it uses sprite mode 2 of the V9938.
Edited by cdoty, Sun Oct 9, 2011 12:14 AM.