Armory Bitcoin Client!

Electrum is an easy to use Bitcoin client. It protects you from losing coins in a backup mistake or computer failure, because your wallet can be recovered from a secret phrase that you can write on paper or learn by heart. There is no waiting time when you start the client, because it does not download the Bitcoin blockchain.

Free Secure Source-Available Multi-Coin Multi-Asset HD Wallet for Bitcoin and Altcoins

BitcoinSpinner is a light-weight, secure, and user friendly Bitcoin wallet for Android. It supports QR codes, password protection for opening the app, doesn't require the blockchain to be downloaded, has an address book and shows your transactions history.

MuCoWa is a multi-coin wallet application that is based from MultiBit and BitcoinJ. It allows you to have wallets in these coins (with more coming soon!): BTC (Bitcoin), LTC (Litecoin), DOGE (Dogecoin), QRK (QuarkCoin), FTC (Feathercoin), CGA (CGAnomaly) and DGC (DigitalCoin).

Dark Wallet will serve as a platform or a starting codebase to deliver a high quality Bitcoin that serves the people.

BitcoinDroid is a thin client for the bitcoin daemon. This app will connect to an SSL-protected instance of the bitcoin daemon and interact with it using the JSON-RPC API. Currently only queries for status.

Hive is an integrated, user-friendly Bitcoin wallet for Mac OS X. Follow the app's development progress at https://github.com/hivewallet/ .

Jaxx.io is a blockchain wallet available as desktop software, a mobile app, or as a Chrome extension