Back in 1998, Tom Nolle (president of CIMI Corporation and long-time network industry analyst) came up with the notion of modeling the deployment of advanced network services using software principles. He launched an open-source project to demonstrate that was possible, and presented the results in two stages to the TeleManagement Forum (TMF). In 2012, when a group of Tier One operators proposed an industry "Call for Action" that became Network Functions Virtualization, Tom responded first by offering two contributions to suggest an approach, and then by assembling a group of vendors to undertake the building of a proof-of-concept implementation of NFV using the same object-software principles. That effort was called CloudNFV.
You can see that from the first, CloudNFVTM has been not one but two things; the design of an open, highly flexible, cloud-driven implementation of the ETSI NFV specification, and a cooperative project to implement that design. The two evolved from the same starting point described HERE, and operated as one through 2013 with Tom Nolle, President of CIMI Corporation serving as Chief Architect. Tom stepped down from that role in January 2014, and at that point there was a fork in the road. The original design is evolving under Tom's direction, and the CloudNFV project is also progressing and evolving. You'll see two links to the left here, one for the design and the other for the project. Please click the link that's appropriate to your interest, and remember that these things are now evolving separately.
Some may be interested in a picture of how they looked when connected. Three documents were generated for the launch of CloudNFV in August of 2013. These were a "brochure" that provides a brief description of the combined design and project, a "white paper" that provided a more detailed description of how CloudNFV works, and an "integration guide" that outlined how the CloudNFV concept, designed to be open, supported integration of other components from other contributors. The versions linked here were the original ones, but please note that things have changed since August 2013. The project has evolved and there may be newer versions of the documents available from the project site (click the Project link to the left). Even if these documents weren't explicitly superceded, there still may be changes so it's best to contact the project people to get confirmation of any details that are important to you.