A couple of useful sites for development
Can be useful for looking up
unicode code points. Particularly
useful for looking up accented characters. Another interesting
use is for UI graphics characters.
Another site to search for unicode characters.
This can be used to look-up emojis and shortcode for emojis.
Let you visually select a color so that you can paste its definition in your HTML or CSS documents
This is a list of "standard" color names.