That’s a long title for such a simple thing. Left Logic has the last HTML Entity Character Lookup you’ll ever need. No more scrolling through entity lists looking for a tiny bit of code just to type a simple character. Search for entity characters based on how they look. So if you need some sort of dash, type a regular minus sign and you’ll get everything that even slightly looks like it. Need something that resembles a P? Good, type a p and you’re set (see screenshot above). It’s fast, and couldn’t be more intuitive. Available also as a OS X dashboard widget, Firefox extension and search plugin.
(Thanks for the tip, Jochen)