jor1k is a OpenRISC 1000 emulator written in JavaScript running Linux. It runs in almost any modern web browser. Have a try and see if it runs in your browser by opening the demo. More information can be found on the Wiki pages.
Sebastian Macke simulationcorner.net
Gerard Braad github.com/gbraad
Ben Burns github.com/benjamincburns
Lawrence Angrave github.com/angrave
Neelabh Gupta github.com/neelabhg