Monster Converter is a Chisel plugin that lets you avoid an unpleasant quirk in Forge. When M1 maps are converted to M2 or Infinity maps, Forge ignores the fact that the monster order changed... so you have to go through your maps and click every single one to convert it. (Or you have to nuke the map.) Monster Converter fixes this. This plugin is also available as part of the Chisel 2.1.6-enhanced package.

Poseidon is a Chisel plugin that lets you flip a marathon map (M2 or Infinity) around the X, Y, or Z axes. Pretty slick, actually. Version 1.1 fixes a number of small bugs. This plugin is also available as part of the Chisel 2.1.6-enhanced package.

If you thought the extra cut on the M2 cd was fun, DOWNLOAD THIS MAP! The Bob Boogie Choir performs Jingle Bells, in all it's gory! (No, that wasn't a typo.) Had me rolling on the floor! (It's only 47K, c'mon, download it!) v1.1 adds a couple of nice touches: the bodies don't disappear after death, and you're killed off when it's over, so you can play it again without quitting.

Two programs: 12oo Shapes Mover, which moves shapes chunks from M1 shapes files to M2/inf shapes files... and 1-10 Twiddler, which can help with the 1-animated/1-non-animated switching problem. (If you don't know what that is, you probably don't need this.) Very useful tools for scenario builders! v1.0.1 fixes a small bug that kept the Twiddler from recognizing M2 files.