What software platform does exists like AWS or Azure? which I can use to build my own cloud platform or any other software for building cloud platform on Dell Servers?
OpenStack or use the native KVM software. It just depends on how technical you want to get and the features your looking for. https://www.openstack.org/ <-- I believe what you're looking for, if not --> https://www.linux-kvm.org/page/Main_Page