The original Software Wars Map, created by Andy Tai, began in 1998 when Netscape first announced it was going to open source the browser code. He updated it a couple times a year after that for a while. As often happens, Mr. Tai became too busy, and the Map was not updated for several years.
Inspired by his original work, the Software Wars Map is now maintained here.
The map was created using Inkscape and GIMP on Ubuntu Linux.