Robin Good: Symbol is free web app which allows you to easily pic any type of symbol character available in its extended and well organized collection and cut it and paste it into any document, web app, or social media channel.
Very simple, very easy, very effective.
Recommended. 9/10
Try it out now: http://www.piliapp.com/symbol/
(A million thanks to Ana Cristina Pratas for having discovered this gem)