Are there any PoS coins without dev controlled checkpoints yet?
NXT has automatic rolling checkpoints, 720 blocks deep, controlled by software ("automatic rolling"), called blockchain re-org mechanism.
Thanks for the reply, could you elaborate on how the checkpoints are 'controlled by software'? Is this some sort of consensus amongst nodes to agree the block 720 blocks ago can never be replaced even in a longer chain? Also out of interest how much time does it take to produce 720 blocks and many blocks are staking coins locked for?
Yeah, it's consensus among nodes. More details in the whitepapers:
720 blocks on average is about 20 hours.