As y'all know "Lightning Network" (a.k.a LN) is coming, which allows us to have streaming payment, micro payment, confidential transaction and, most notably, fast & cheap Bitcoin payment fee across multiple coin networks.

LN needs SegWit (or SegWit helps LN to be precise) so we've witnessed a whole bunch of coins beating "SegWit" drum for a while. (https://bitcointalk.org/index.php?topic=1777136.0)

As few coins start hitting LN drum already, I'll list & update them here for a reference.

On Mainnet

• Syscoin   ( Apr. 27, 2017 https://twitter.com/syscoin/status/857409877609562112 )

On Testnet


In Development

• Litecoin ( Apr. 29, 2017 https://twitter.com/SatoshiLite/status/858007334471086080 )

Planned

• Viacoin

^* I have to mind you that altcoins' bullish rally is closing to its end, and I'd advice not to put your valuable assets in danger.