The Freedom class was a 24th-century Starfleet design with a single warp nacelle, known from the wreck of the USS Firebrand among the ships destroyed at Wolf 359.
The class appears only in The Best of Both Worlds, Part II. When the Enterprise-D reaches Wolf 359 it finds the remains of the fleet that tried to stop the Borg cube, and one of the hulks is a ship with a Galaxy-style saucer, a short neck and one nacelle slung beneath.
Neither the name of the ship nor of its class is spoken. Production sources and reference works identify the wreck as the USS Firebrand and its type as the Freedom class.
Like the other graveyard ships it was a study model assembled quickly from kit parts, and it is one of very few Starfleet designs of the period to be shown with only one nacelle.