http://stackwallet.i2p/blog/index.html
Some were open source, but had a terrible user experience, others were single coin only, and still others had good design, but the source code was closed, leading to very high trust involved. Most wallets were some combination of the above, but never all of them at once. Enter Stack Wallet, the first multicoin, open-source wallet, that sticks to its ideals, and looks good doing it.