Tether is a cryptocurrency launched in 2014. It is a so-called stablecoin currently leading by market capitalization. Although according to the initial idea, each Tether was backed by $1 (that was going to keep the price of Tether stable), the company not always managed to maintain this price (at some point in October 2018 the price dropped to $0.9 per one Tether). Tether succeeds in terms of market capitalization and its price is almost all the time is really close to $1.
iExec RLC (RLC) is an ERC-20 compliant digital asset and used as a payment method for using the iExec network’s resources. RLC abbreviation stands for “runs on lots of computers”. A fair number of exchanges features RLS in its cryptocurrency pairs.
Qtum (QTUM) is an opensource blockchain platform launched by the Singapore-based team of developers in 2017. The project provides an opportunity to maintain the connection between the virtual machines and the blockchain. Also, Qtum users can create smart contracts and build DApps with the help of the platform. It is important to mention that Qtum is compatible with DApps built on other blockchains.