Electrum was released in 2011 and is a popular wallet for Bitcoin (BTC) only. The wallet offers a very basic and intuitive design and is a good choice, especially recommended for beginners.
Security
6
Customer Support
3
User Experience
6
PROS
multisignature support
two factor authentification possible
fair fees (users can choose to realize the transaction within the next 1, 2, 5, 10 or 25 blocks)