if you're interested in animating ocean surface and you won't compute loads and loads of math, that is included, you can use LibOcean library for you projects. Right now you can have just alpha version demo of this small library, but soon there will be available pretty large library for animating water surface in realtime on CPUs (and we're also thinking about GPU support through OpenCL).
If you're interested, please visit my blog, where I further describe info about the project - LibOcean entry
Of course, some eye candy here is needed - so you can visit my YT channel, if you wish (link on related videos on Blog), and here is some screenshot (I appologize if it is too large):
