Skydive is an Open source project mainly developed by RedHat that gives a global view of a network and enables the user to install probe on it. It targets cloud deployments (OpenStack and Docker) and gives a good topological view of virtual switches.
The new OVSOpenflow extension provides a way to visualize Openflow rules deployed on an OpenVSwitch directly from the Skydive dashboard.
The code is available on GitHub. Skydive project is licensed under Apache 2.0.