Add, remove, manage, and see collision points for any area you input in. The imageoffset var has a glitch, and zooming in and out with the arrow keys will not handle the mouse location appropriately. 'R' is to refresh the image and the rest is easy enough to figure out. Right clicking a point will display the image on the snapped location, and left clicking will add a collision to the snapped location. The grid intervals and offsets, etc... can all be changed in the various ini files.
It creates and or modifies a text file holding all the collision points you select. Which is later read by whatever Python program to make sure your character doesn't go past those certain points.
www.1v7.com/drsane/area%20editor.zip
Check it out.