If you want to make your own, you can; Rexjericho put the source code for his software up on Github, and Blender is free. The process of actually making one of these does take a while though. That ...

'Flow' director Gints Zilbalodis and plug-in developer Mārtiņš Upītis talk about the development of the water plug-in used to create the Golden Globe-winning film.