Steem - Cryptocurrency that can be traded STEEM

Steem Power - Steem Converted into Steem Power doing so locks up your steem for a few months but gives you a higher vote value with steemit

SteemDollars - Should be pegged at $1 USD per Steem Dollar however at the moment its about $3.30 its just another crypto currency that can be traded and earned here on steemit

Savings - You can lock up your steem in savings if you want but there is not really any point other then a bit of security.