Niobium is a Ethereum ERC20 token created in partnership between brazilian an austrian entrepreneurs. Niobium Coin will boost all the services that will be provided in the platform of the Digital Business Exchange of São Paulo (BOMESP). With BOMESP, any company can have its own currency or can operate in the world of virtual currencies in parity with the Bitcoin, Ethereum, Ripple and the Niobium Coin itself. The principal services provided by the BOMESP are charged by means of Niobiums, which ensures the maximum valuation and the use of the currency, as well as extremely low percentages in order to enable its users to carry out millions of transactions per second on its platform.
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.