Let's say you want to quickly insert words with special characters for example J'ai eu quelques ratatouille™ au café près de la rivière ce matin ☺. You can either google for the official ASCII character for those words or remember the keyboard short cut or insert them from programs like Word. Or you can copy and paste those characters in a second from CopyPasteCharacter.com.
CopyPasteCharacter.com lets you copy and paste a number of commonly used special characters in an instant. Just click on the character to copy and paste it into any programs in your computer. A really useful website indeed.