Well, with a topic like that, I should mention this, even though I just installed
AkelPad to check out all the work, thank you!, that's been done there.
I like Jan Goyvaert's EditPad Plus (of RegexBuddy fame). I'm comfortable with it. There's a rather out-of-date Syntax Highlighting theme for XY available from the main site that's very usable as is. There's also a download, for purchasers, of a syntax highlighting editor, and I may end up updating it myself, depending on what I decide about
AkelPad (I do like EditPad, as well as his other software). It has good support for clips, projects, dual view, and it supports the JGSoft regex engine. (And, ofc, features like block editing, macros, etc. etc.) Has some other very advanced features (especially regex related) as well that are worth a look. Oh, and it has context-sensitive help as well (opens XY help if cursor over a key word or from a selection).
https://www.editpadpro.com
You should look at his other offerings as well. It also has an excellent online regex tutorial, my favorite, along with RexEgg.
I've updated the syntax coloring scheme for XYplorer. Here's the link. It is paid editor, but imho, worth it:
https://www.editpadpro.com/cgi-bin/cscs ... ?focus=291 as of 18/11/16.