This is for sharing topics I learned which might be interesting for others.
Today I stumbled over an interesting site that lists all UTF-symbols, which can be used like characters when using UTF coding in the own database.
That might be an alternative to showing PNG-icons in some cases, which need much more space than a single UTF symbol. Examples:
http://www.w3schools.com/charsets/ref_utf_dingbats.asp
It is possible to just copy-paste the symbols from there, like ❏❌❔✞✔⋃◔
That w3schools offers also a huge range of tutorials, e.g. for JavaScript, SQL, AngularJS.
Example for JS object tutorial:
http://www.w3schools.com/js/js_object_definition.asp