No doubt that you will laugh, but I need one free host with zend optimizer for running a e-currency exchange website. I want to take exchange fees as low as possible. So, I don't have plan to spend money on hosting and others.

The another factor is my capital is not big.
@bdsurf,
I'm not sure what is zend optimizer support but definitely I haven't heard this word in any free or paid host. In paid host, at least you can expect something, but definitely I doubt if you get this feature in free host.
As far as I know, the highest space and bandwith provider in the free plan is fusedtree.com . You can visit their forum and ask the question to the admin if they are providing cgi bin and that zend optimizer support.