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yam.finance
Oyster Pearl (PRL) is a currently inactive ERC20 token.The attack against the coin liquidated millions of PRL tokens.
Power Ledger (POWR) is an ERC-20 compliant market token of the energy platform, that is listed by a number of exchanges. It can also be traded against the fiat currency on some of these platforms: for example, against USD on the LocalTrade exchange.
PowerPool is a solution for accumulating governance power in Ethereum-based protocols by pooling tokens (COMP, BAL, LEND, YFI, BZRX, AKRO, etc.). The CVP token name refers to Concentrated Voting Power: CVP holders decide how pooled GTs will vote when the vote occurs in their root protocol. Also, CVP holders govern the entire protocol (key ecosystem variables, collateral types, adding new pools).