1) Comp 2) Comped thing 3) Freebee 4) Gift 5) Giveaway 6) Good for nothing 7) Handout 8) Hotel soap 9) Movie pass 10) No-cost item 11) Prize in Cracker Jacks 12) Promotional gift 13) Sample 14) Something for nothing 15) Something given away 16) Something that is free 17) Store giveaway 18) Thing provided without charge 1) Comp 2) Freebee 3) Handout 4) Pass 5) Privilege 6) Sample 7) Treat 
Freebie is slang for something given free.
[n] - something that is free (usually provided as part of a promotional scheme)
something given without charge or cost, as a ticket to a performance or sporting event or a free sample at a store.