Notepad GNU is Windows Notepad on steroids
It occupies the space in between Notepad and Notepad ++. Notepad GNU does offer loads of features, though not quite as many as Notepad ++. Which is fine, because plenty of people just want Notepad with a few tweaks like line numbers, bookmarks, and syntax highlighting. Notepad GNU does all that and more!
I'd be remiss if I didn't mention the foreign language install menus - not a surprise, since the developer's site is in Russian. Click through, and you'll wind up with an English language interface when you launch the app.