Nimbus

• Not to be confused with the Nimbus Eth 2.0 client.
• Is a new transaction version for Bitcoin Cash introduced by Tobias Ruck.
• From this Bitcoin.com article (2-12-2019):

"In the areas where Bitcoin Cash could shine — Gambling, games, exchanges, and oracles,” Ruck detailed in his video. “Bitcoin Cash isn’t capable of such smart contracts at the moment so I’ve worked on a few changes to the Bitcoin Cash protocol and I’ve given it a fabulous name — Nimbus.” 

Ruck decided to call his idea Nimbus, because of the intention to “make it rain” with transactions." Ruck broke down some of the smart contract types into genres like gambling, exchanges, and oracles on the ETH chain and insisted that when it comes to “simple smart contracts” BCH could do them “really well.”

Ruck puts an emphasis on the fact that it costs $4 to update the Chainlink oracle. If developers used BCH for this particular oracle example “their revenue would double” Ruck claims."