Stealthcoin (XST) has been rebranded to Stealth (XST): https://twitter.com/stealthsend/status/993226001101545473 Stealthcoin provides a complete anonymity solution for cryptocurrencies. Stealthcoin has a fair distribution with nearly four hours of low block rewards, a small premine of 1%, and the long-term energy efficiency of proof-of-stake minting.
UQC is a decentralised virtual currency based on the ERC20 - token, one of Ethereum Technological trends. The goal of this blockchain asset is to supplement the development of UQUID Ecosystem. In this virtual revolution, coin holders will have the benefit of instantly and effortlessly cash out their coins. The uquid card project started from 2016 was became the first project to issue prepaid payment cards for bitcoin and altcoins. Uquid cards now support over 100 types of altcoins. The uquid coin was born with the goal of supporting the uquid ecosystem in helping altcoins users to shop online (ebay, amazon) directly through the uquid ecosystem and build up an card-less system by 2020.