Fee Free BT Cards

Is there a current list somewhere of fee free 0% balance transfer cards anywhere? Particularly those of extended duration (e.g. 20-30 months).

It has been a long time since stoozing - is it still easy to transfer from one credit card to another creating a positive balance - and then moving that to your current account - particularly for those cards not allowing super balance transfers to current accounts.

For example - new credit card with 10k limit. Transfer to credit card B creating 10k positive balance, and then move to current account. Used to do this regular many moons ago. Which cards still allow this?

Thanks