You can also try Coinbase. They have both Bitcoin and Ethereum wallets you can use at the same time. I didn't yet use their ethereum wallet so, I don't know if their ether wallet is secure.
Anyways, you can also try these:
Official Geth (go implementation): Command Line, Official
Eth (c++ implementation): Command Line, Official
Mist Ethereum Wallet: GUI, Official, Full Node, App, Supports ETH, Generic Token Interface, Generic Contract Interface
Unofficial MyEtherWallet.com: by tayvano/insomniasexx (me) and kvhnuke, GUI, Client-Side, Website, Can be Downloaded, Open-Source, Supports ETH, DAO, DGD. Also has Chrome Extension
JAXX: by Kyptokit, GUI, Multi-Platform (chrome extension, phone apps, etc), Client-Side, Partially Open-Source, Supports BTC, ETH, DAO
Icebox: by christianlundkvist @ ConsenSys, Primarily for Cold Storage, Downloaded, Open-Source
EthAddress.org: by ryepdx, GUI, Client-Side, Website, Can be Downloaded, Open-Source
ethereumwallet.com: By Kryptokit, GUI, Website, no longer under development (see Jaxx)
EtherLi: Multi-sig Ethereum Web Wallet, GUI, Website, online
Haven't used those though.