[Darky: Contains protector; should it be allowed to be uploaded? -oz02]
This is a tool designed to modify maps without running WE, or even need no War3 installed.
Current implemented functions:
MPQ Files Listing and Extracting
Map Protecting
Basic Information Editing
Trigger Strings Editing
Unit Editor (Icon/model/ability part is not listing now, but other things work fine. There are also excellent option "Create Custom Unit As Hero", aka Copy a unit to a hero, you can find it in the right click menu)
Item Editor (the same as above)
Thanks to Zepir & PitzerMike for their document "Inside the W3M Files"