A social network digital coin, the ReddCoin (RDD) had forked from Litecoin as far back as in 2014. It is currently listed by a few exchanges with the possibility to buy the coin for fiat currencies. The ReddCoin blockchain “uses personalized IDs for social media tipping”.
Scry.info (DDD) is an Ethereum-based token of the Scry.info global data aggregator. DDD token is listed on a few exchanges paired against bitcoin and Ethereum. In this abbreviation, “DDD” stands for "distributed data depositary".
Ambrosus (AMB) is a utility token based on Ethereum protocol. As of now, it is available on a number of exchanges, including Binance. This token works as the fuel for Ambrosus ecosystem.