Lots of cord & tent pegs always found on every trip.  I keep 'em.  Usually found on the daily find-10-things camp clean up.

Stove in an army style satchel.  Found on a portage.  Likely forgotten after lunch.  Left it in plain view in case the owner came back for it.

4 sleeping pads found at one end of Batchewaung Bay.  Rolled up and bundled for transport.  A couple had been nibbled by critters.  No portage near.  No evidence of anyone having been around.  There had been wind storms a few days earlier.  I assumed they were lost and carried them to the Nym portage where I promptly forgot about them.

Found a map after losing mine.  I wasn't going anywhere I needed a map for.