Large distributed research network

I remember having heard of a large distributed computer network being operated by several universities. As far as I remember, it would be possible to get several (hundreds) of virtual machines to perform computations, testing, evaluations, etc.

Unfortunately, I do not remember this network's name, but I have the feeling that it was similar to "ResearchLab" or "ScienceLab". However, I was not able to find a network with such a name...

Hope that anyone out there can help. Thanks a lot!