Minero
Monero miner for Web browsers.
4 Alternatives To Minero
CoinImp
JavaScript minining solution for webmasters.
Coinhive
Coinhive offers a JavaScript miner for the Monero Blockchain that you can embed in your website.
Crypto-Loot
CryptoLoot is a Javascript web miner for Monero, a great coinhive alternative with cheap fees and excitingly faster hashrates. Make more money from your visitors!