Connecting 2+ projectors

[Kenthevj]

Simple question and solution except that I own a Matrox DVI Triplehead and it has never worked properly. Is there any other way?
My Mac only has one Thunderbolt.

[lightbx]

Matrox Tripleheads don't work with OS X. Have you tried Bootcamp just to satisfy yourself and see it working?

[Zoltán]

I use a triple head with osx,it works fine.
I can drive it 2x1024x768 from hdmi with a passive adapter,
get a thunderbolt to dual link dvi adapter, and you can get the 3 outputs.