Buick key (trunk/door)
Toyota key (trunk/door)
GM key (trunk/door)
Keyless door/trunk/alarm remote (for GM, above)
Off the Record Frequent Buyer keyfob (a record store in San Diego, CA)
Wegmans Shoppers Club keyfob (a grocery store chain in NY, etc.)
Master padlock key
House front door key
House rear garage key
Front door key of a house in Riverside, CA that I haven't lived in for almost four years
...and two unknown, random keys.