There are some bots and other specialized stuff, no consumer clients that I know of. You can anyways run it in any browser, why would you need a (compiled) binary that is platform specific?
There's an iOS app, no idea about usage, since I don't own Apple hardware. (
https://itunes.apple.com/us/app/ripple-client/id694391487?mt=8) Probably one of the few iOS apps that can send Bitcoins by the way.