🙂, 🙂 and :smile: => 🙂 (smile)
😀, 😀 and :grin: => 😀 (big grin)
:lol: => 😆 (laugh out loud)
8), 😎 and :cool: => 8) (cool)
:roll: => 🙄 (roll eyes)
😉, 😉 and :wink: => 😉 (wink)
😐, 😐 and :neutral: => 😐 (neutral)
🙁, 🙁 and :sad: => 🙁 (sad)
:cry: => 😥 (crying)
:idea: => 💡 (idea)
:arrow: => ➡ (arrow)
😮, 😮 and :eek: => 😮 (surprised)
😯, 😯 and :shock: => 😯 (shocked)
:!: => ❗ (look at this!)
😕, :?:, 😕 and 😕 => 😕 (question, confused)
:oops: => 😳 (boo-booh, embarrassed)
😡, 😡 and :mad: => 😡 (mad)
😛, 😛 and :razz: => 😛 (razz)
:evil: => 👿 (evil mind)
:twisted: => 😈 (twisted)
:mrgreen: => :mrgreen: (green)

Here is a bigger list of smileys from NetLingo.