Rubycoin is a Proof of Stake cryptocurrency that was issued by the cryptocurrency trading platform Trader Daddy.

Fortuna is developing a blockchain for the derivatives market. Fortuna hopes to leverage the benefits of blockchain to improve the operational efficiency during each step of a transaction, including contract creation, price quoting, contract signing, trading, and clearing. They also hope to introduce a number of decentralized innovations, such as structured smart contracts and a decentralized quote scheme. Users can execute P2P trades and create unique derivatives with different underlying assets, deal structures, time lengths, margin ratios and other transactional characteristics.
Fortuna has an innovative consensus algorithm called DPOSA, which is a variation of Delegated Proof-of-Stake (dPoS), and gives users that are more active in the network an advantage in the staking process. The platform is powered by the FOTA coin.