Working on my GBA/DS rom hacking document (DS 3d is not for the feint of heart or those that do not agree with matrices) I stumbled across this and though I would share.
It is a simplistic level editor for new super mario brothers:
http://jul.rustedmagick.com/board/thread.php?id=244
Old link (may not be current)
http://acmlm.no-ip.org/board/thread.php?id=2079
romhacking.net has a mirror too:
http://www.romhacking.net/utils/457/
Here is the level format should you wonder:
http://treeki.googlepages.com/nsmblevelformat.txt
It is a simplistic level editor for new super mario brothers:
http://jul.rustedmagick.com/board/thread.php?id=244
Old link (may not be current)
http://acmlm.no-ip.org/board/thread.php?id=2079
romhacking.net has a mirror too:
http://www.romhacking.net/utils/457/
Here is the level format should you wonder:
http://treeki.googlepages.com/nsmblevelformat.txt