Live Instance flowsim.flowgrammable.org
Code Github
Contributing Contributing.md

Flowsim is a tool that helps you learn OpenFlow quickly. It is a completely self-contained web application, no system configuration is necessary. In minutes a user can configure an OpenFlow switch and single-step a packet through the OpenFlow pipeline. At each stage of a simulation, internal data structures are visible, so a user can see exactly how the OpenFlow pipeline operates.