Simple Transiiton Effect

I really like this simple image transition effect and am interested in figuring out if this was a stock effect that I could purchase. I’ve seen a bunch that have this tile effect however this one has a “raindrop” like effect before the tile which makes it unique. Anyone have any feedback on how to create this and might be willing to give it a shot? I’d be willing to pay.

http://www.buntlegalsearch.com