Site:
www.arweave.org
Ruff (RUFF) ERC-20 token is listed on the number of exchanges paired with other crypto coins. It is used for settlements within the RuffChain.
Aeternity (AE) token can be used as a reward for miners and allows its holders to participate in the voting process inside the blockchain. It is also available on multiple exchanges.
Released in 2014, Groestlcoin (GRS) cryptocurrency enables private and fast transactions. It is the first coin that activated Lightning Network and SegWit. You can buy GRS for both crypto and fiat currencies (USD, EUR, GBP, KRW). This cryptocurrency is listed on multiple exchanges.