shares some characteristics with PoW but also suffers from a [lighter] Nothing-at-stake problem

Here are the articles in this section:

Proof of Process

Proof of capacity (PoC)

Proof-of-Signature (PoSign)

Proof of Retrievability (POR)

Proof of Location

Proof of Reputation (PoR)

Proof-of-Proof (PoP)

Proof of History

Proof of Existence

Proof of Research (DPoR)

Proof Of Activity

Proof-of-Weight (PoWeight)

Proof of Zero (PoZ)

Proof of Importance

Proof of Care (PoC)

Raft

Proof of Value (PoV)

Proof of Participation (PoP)

Proof of Believability

Proof-of-Stake (POS) / Proof-of-Presence (PoP)

Proof of Ownership

Proof of Quality (PoQ)

Proof-of-space (PoC)