It's not a ridiculous question. Every serious open source project should have its recursive acronym meaning. Notepad++ is no exception: Notepad++ is nOT notEPAD++
OK, it sucks. At least I tried.
Notepad++ started as an improvement for a proprietary code editor. It has been a long way ever since and, nearly ten years and two major Sourceforge awards later, this is how it is rated in independent university work: http://oedoc.free.fr/NppHelp/Software_Requirement_Specification-_Notepad__.pdf