Private, Public and Hybrid Clouds

Hi all,

Private, Public and Hybrid Clouds

I'm now testing OpenStack;
Home OpenStack Open Source Cloud Computing Software
-Infrastructure as a Service (IaaS)
-Platform as a Service (PaaS)
-Software as a Service (SaaS)

It is an Open Source software.

I'm interested to know whether there are other Open Source software with equivalent features?

TIA

B.R.
satimis