I don't get it??

Does anyone know how to do those little signs like the 愛 heart, tick sign, smiley face and change the 書く font. I see people do it on thier profile, フォーラム and walls and I'm not talking about emoticos.
This プロフィール for example link
They have little signs (soz Smilebaby05 just an example)
PLZ HELP