An interesting shapes editor that allows editing of the shapes from within the program.

A very simple little drag-n-drop app that will concatenate a bunch of quicktime movie MIDI files into a Marathon Music file.

OPE is a quick way to add/remove different aliens on the net levels. Easier than doing the same thing with Mia or MME. This version fixes a few bugs.

If you play on a 68K machine, GET THIS! It's tiny, and it only does one thing, but it might just be the most useful utility out there for non-PPC owners. The biggest cause of crashes is the presence of zero-length lines in a map. This leads the cpu to attempt to divide by zero, which makes it crash... Bungie seems to have fixed the problem for the PowerPC code, but 040 and 030 owners were out of luck, before now... This little baby simply instructs your cpu to ignore any divide-by-zero operations. Run it just before you play Marathon, and you'll be free of those pesky Type 4 errors forever!