http://miner.nablabee.com/

There are a lot of services like CoinHive or CryptoLoot and with projects like coinhive-stratum-mining-proxy adblockers no longer can cut off browser miners.
A lot of sites are using this technology to monetize their business.

The in-browser mining tecnology is by now very mature and cannot only be limited to be just an advertisement alternative.

Mine2 is an online cryptonight miner that can be used to mine almost any (cryptonight) currency directly in the browser and without any software installation.

This service can become very handy for beginners miner or in situations in which you cant install the mining software on a specific machine.

The project is in an alpha-state and all sort of advice are very welcome