ooko.pro It's not just a demo, it's a working service and a lot of people use it every day. The presence of registration is both a necessity and a kind of barrier from disinterested users.
It's also a barrier to interested users. I'm one. I am currently using 3 kanban solutions for different needs. I'm always looking for better solutions, but I'm not going to invest much in something with no docs and one screenshot.
That said, your answer here tells me what I need to know about the product.
That said, your answer here tells me what I need to know about the product.