IaaS cloud is a place, where you can simply create and manage your virtual servers and IT infrastructure.
By connecting your own hardware, you can create elastic environemnt for your team to integrate your projects, make tests or even share your services in Internet.
Private cloud is apporach to use own hardware, like servers and computers to better use resources. With this approach you can save money and still keep your data in your company.
CoreCluster is such private computing cloud. You can connect all your computers (including servers, workstations or laptops) together, into one, homogenous environment.
This software allows to create virtual instances, using flexible networking and store your data across all computers.
As it is Open Source software, you don't risk to vendor lock-in or to pay large licensing costs. GNU GPL license allows you to use it and modify for at your own.