I learned that exakat a static code anaylzer for PHP uses TinkerPop so I'd asked if they wanted to be added to the "Powered By" listing on our home page:
https://www.exakat.io/ - Static analysis engine for PHP, powered by Gremlin. I'll get that added unless there are objections in the next 72 hours (Monday, May 28 2018, 6:00am EST) - thanks!