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)