XPlode was the original program that replaced RunOnceEX and Batch scripting. It's driven completely by an XML file, which means you can open it in any editor that supports highlighting and find problems easily, and lets the user completely control its look. It has the ability to "merge" with the WINNTBBU look, as well as remain independent.
While the first write of this page was very extensive, it now pales in comparison to the PDF file included in the XPlode 4 release. The PDF is very detailed with what each tag does in the XML file, so please read that.