Site: bitnuk.com
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Mercado Bitcoin exchange is registered in Brazil and accepts deposits in Brazilian reals.
Kyber is the decentralized liquidity aggregator that ensures swap of various tokens. Due to the on-chain liquidity protocol, Kyber allows for quick exchange of tokens in any decentralized application. 
Heat Ledger Ltd was started in Finland in 2016. As of now, this is the brand name for wallet and a decentralized exchange. HEAT Wallet & DEX offers a modern crypto wallet and non-custodial exchange service.