From items listed as of this May in the online store of the National September 11 Memorial & Museum. Several items have since been removed from the site.

Sterling-silver FDNY charm — $65.00
9/11 Memorial coffee mug — $10.95
9/11 Memorial pencil pack — $4.95
Search & rescue dog plush toy — $19.95
Dog heroes buttons set — $8.95
Memorial Pool & lights iPhone case — $11.95
Memorial Pool mouse pad — $14.95
Police officer with rescue dog bookmark — $12.95
Towers…