There are many keyboard shortcuts to send smiley or emoticons and in almost all chat messengers it will be more or less same. Most popular chats are Yahoo, GoogleTalk (Gtalk), Skype, FB emoticons too (FaceBook is at world rank 2)
I will post images for all possible emoticons of most popular chat services that i collected from various sites. few are common to all messengers and few are hidden one like yahoo smiley for flag, rose etc. Gtalk is having three different tastes for emoticons: Classic, Round, Square:
Enjoy All the Emoticons at one place. Happy Alien blogging !