makeBG is a series of programs that build file lists. The created file is usually a VBScript file containing a single variable and a gigantic array of filenames (and relative paths). (Some versions write an XFCE background list instead, and I've done some work on a Javascript version.) It is part of my random background web page thing for Windows.

The number in the name typically changes when I change programming language or target OS. (See makeBG.txt in any makeBG archive for more info.)

makeBG can be downloaded from the downloads page.