Yadex $VERSION ($SOURCE_DATE)
In its previous incarnation, Yadex was named Yade, which means Yet Another Doom Editor. I later realized that this name was already taken (by Yet Another Diagram Editor). I decided that the easiest way to remedy this would be to append a fifth letter. I chose "x" because it has a neat regular shape and because it evokes both Unix and X and therefore conveys an important political message ;-).
The right way to typeset it is with a capital Y and the rest in lower case. Think of it as of a proper noun.