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.
Kava is a DeFi platform that offers collaterized loans and stablecoins built with the Cosmos SDK. It aims to be cross-chain enabled bringing stablecoins to major crypto ecosystems such as BTC, BNB, ATOM and more. KAVA token will act as a governance and staking token to secure the network and vote on key upgrades. USDX token will be issued as a stablecoin backed by crypto asset collateral. Some calls it the MakerDAO on Cosmos. While USDX will be have similar to DAI, the USD stablecoin on Ethereum.