The Yongnuo you found on Amazon is designed for Canon though the product images they show seems to be the Nikon version, notice the different positions of the small connection points compared to the camera images?
Basically if you can find a trigger that has none of the smaller connections, and only has the 1 large connection, it should be compatible with any speedlight that uses the same standard hotshoe, regardless of brand. There might be issues of electrical power compatibility but usually the flash is powered by its own battery and not the battery from the wireless receiver (which is only used to power the wireless component and to 'jump start' the flash's circuit).
However as that large connection point only connects the circuit for firing the flash, without the other connectors, the flash might not know the sync speed of the camera shutter, whether you want rear shutter, or slow shutter, etc.
By the way, have you considered Continuous LED lighting options instead of speedlights? There are some great low cost LED light panels of various sizes on Ebay. With continuous lights, you don't have to worry about camera sync speeds and exposure settings. Just shine the light continuously on the subject, have the camera or hand held meter give you the exposure settings and press the shutter.
Something like this for example: http://www.ebay.com/itm/160-LED-Video-L ... 414f544acc
I have 4 of them, each one gives enough light over a wide enough area to do some portraiture work. And they can be attached together to form a larger panel, or placed around a small studio type space to light the subject. Of course if you work in a larger studio type space or trying to photo large scenes, you might need to buy larger panels or buy more smaller panels like these and connect them together.
I think it would be a good idea to explore this option too.