Matic Network provides scalable, secure and instant Ethereum transactions. It is built on an implementation of the PLASMA framework and functions as an off chain scaling solution. Matic Network offers scalability solutions along with other tools to the developer ecosystem, which enable Matic to seamlessly integrate with dApps while helping developers create an enhanced user experience.
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.