Board Game Arena

I'm interesting in game development. But I want to know the game who can be réalisés on bga

The wiki gives you all the details : http://en.doc.boardgamearena.com/BGA_Game_licences, including a link of already acquired licenses.

I'm connected, but i see 'visitor not allowed'

Have you registered on BGA STUDIO, and are you logged in the studio? (the studio is for developers, it's not BGA main site)
https://en.studio.boardgamearena.com/

It's OK. Thank you