Notepad++ is great, my only complaint is that I don't like how heavyweight the ctrl+f process is, where you have a full-on popup window rather than just a little area for the search box somewhere along the edge of the window, like most apps do.
I'm not opposed to also having this, but imo it should be, like ctrl+shift+f or something.
That's how Android Studio works, for example. Ctrl+f brings up a find-replace subwindow at the top of the screen that works for that one file, but you can also do a "search across entire project" or "search across subdirectories" that comes up in a popup.