I have actually come across Kozjin before and did some research. Their project is huge, they are actually having their pre-sale with a 15% bonus right now. They have a working app, awesome website, recently featured on nasdaq and also secured a exchange listing with digifinex. So kozjin seems to have my vote right now.

Was looking at Hox, couldnt find a their site although they made a nice video.

Bitacium social media is very active, mentioned exchange listing and IEO but dont see any confirmation so thats a bad sign.

blockium is an interesting project but would suggest reading it up on your own. They have a nice website, working app.

Blockstate is an STO, not really my kind of thing right now.