are there any other coins that have a halving coming or who just have halvings like ltc and btc?
LTC halving is pretty new to me. I know BTC halved to BCH, but not too sure if LTC also halved. Maybe Ethereum will halve too in future to Constantinople.
That was not halving dude, that was forking.
Halving is reduced mining reward when it reached a certain block height.
For example ETH was halving in Feb 2019 from 3 ETH reward per block, to 2 ETH per block.