Quarkcoin is a coin which increases security by using 9 rounds of hashing from 6 different hashing algorithms - blake, bmw, grøstl, JH, keccak, skein. 3 of the hashing rounds apply a random hashing function. This compares with Bitcoin's solitary use of SHA-256 algorithm. There is no pre-mine for this coin. A new block is generated every 30 seconds and 2048 Quark is given out as reward per block at the beginning. This reward halves every 60480 blocks or roughly every 3 weeks. The initial supply of Quark is 247 million and this is expected to be mined in roughly 6 months since launch date. The supply will then continue to increase at an inflationary rate of 0.5% per year. Quarkcoin was launched on 21 July 2013.
Roobee describes itself as a blockchain-based investment platform that allows people to make investments starting from $10. Roobee uses AI and blockchain to provide its users with transparent records and personalized investment product choices. Roobee blockchain infrastructure is powered by Ethereum blockchain and Roobeechain - a permissioned blockchain based on HyperLedger, with the goal of providing users with data privacy without compromising transparency and security. More information can be found at (https://roobee.io)