GitHub celebrated the addition of its one millionth repository by announcing the inclusion of notable projects like the Mono project and OpenStack. Mono, an open-source implementation of Microsoft's .NET Framework, adheres to ECMA standards for C# and the Common Language Runtime, and its code is available under the mono organization on GitHub. OpenStack, which provides software for managing virtual private servers and scalable object storage, also joined the platform, offering an alternative to its official code on Launchpad by allowing developers to track progress via Git and GitHub under the openstack organization. This expansion enhances GitHub's repository offerings, welcoming diverse open-source projects and facilitating easier access to development updates.