With Filestar you get 1 different skills for working productively with Warcraft III Map (.w3x) files.
About .W3x
Name
Warcraft III Map
Extension
.w3x
Format
Binary
Category
Game
Developer
Blizzard Entertainment
Description
A Warcraft III map (.w3x/.w3m) or campaign (.w3n) - an HM3W header followed by an MPQ archive holding the terrain, units, script and preview picture. Filestar extracts its files.