Agreed, although there are a few examples of VMware employees creating internal tools that end up open sourced - Review Board is an excellent example (basically all the management tools in the ESXi environment, including the console UI, are written in Python/swig - they have sharp coders in many languages).

Maybe this falls into that category - vCenter Orchestrator workflows are all written in JavaScript (or at least,they used to be).

EDIT - Apparently this is based on Eclipse Orion, so unlikely it's something used in the way I postulated.