https://multiexplorer.com/wallet
This project is still very young, a lot of things have not yet been implemented. What does work is basic operations like sending and receiving bitcoin. It supports a handful of currencies, and more to come for sure. It runs off another project of mine called "moneywagon" which is a "lightweight full node". I mostly work on this projects weekends. If you find a bug I'll fix it within the next weekend. This wallet uses a "blockchain.info architecture" where the private key is unknown to the operators of the site. The extended private key that all of your addresses are based off are stored on the server encrypted. If a hacker gets access to the server, they don't have access to your funds. Multiexplorer wallet actually has better privacy than blockhain.info, as we don't even know your wallet addresses.
There is also a blockexplorer, and soon to be exchange. The exchange will be like shapeshift, in the sense that it will be entirely "on chain".
Also there is an API that is documented here: https://multiexplorer.com/api
I'm mostly building this for myself. If other people want to use this, then you are more than welcome to. I'm not a corporation trying to get VC money or anythng like that. I'm just a perrson making stuff in my spare time.