Check https://tron.network/enindex.html

Go all the way down to partners, and those are it.

Also, something that hasn't been pointed out yet, Justin Sun has yet to mention that he's partnered with Wei Dai (the creator of OFO the biggest bike sharing company in the world). I did some research and a few days ago Justin Sun mentioned that "another 100 million user app will be on the Tron Protocol Network", and I'm almost certain it's OFO.

If this is actually true (and evidence is excruciatingly pointing that it is), Justin Sun would be placing a crypto-monopoly on bikesharing by being the network of 2 of the biggest bike sharing companies in the world (Mobike being the only one left out).