Here are some of the best open source miners with their supported algorithms:
ethminer: Supports Ethash.
ethash: Supports Ethash.
acominer: Supports Ethash.
kawpowminer: Supports ProgPoW.
Ravencoin: Supports KawPow.
VerthashMiner: Supports Verthash.
bfgminer: Supports Keccak, scrypt, and sha256d.
XMRig Supports RandomX, KawPow, CryptoNight, AstroBWT, and GhostRider.
sgminer-phi2-branch: Supports ethash, phi2, lyra2Z[z], allium, x25x, lyra2REv2/v3, argon2d, yescrypt, neoscrypt, 0x10
ccminer: Supports a
long list of algorithmscpuminer-opt: Supports
more than ninety algorithmsI tried to find the latest
Gateless Gate Sharp but it seems like it has been removed, and there's only an
earlier version available for some reason.
If you know of any other open source miner, specially if it's being actively developed, please share it here.