It was said that no one could tell a lie with Fragarach at his or her throat, thus the name 'Answerer'. It was also said to place the wind at the user's command and could cut through any shield or wall, and had a piercing wound from which no man could recover.
In Hounded_(novel), written by Kevin Hearne, Atticus O'Sullivan wields the famous sword, and his possession of it is the cause of most of his troubles.
In the visual novel Fate/hollow ataraxia, the sword appears as the weapon of Bazett Fraga McRemitz. It is a weapon that, upon the activation of an opponent's strongest attack, reverses time and instantly kills the enemy.
In Diane Duane's novel A Wizard Abroad (as part of her Young Wizards series), Fragarach is used by Annie Callahan as part of a reenactment of the Second Battle of Magh Tuireadh. Besides its common use as a weapon, Fragarach is used to open a gate to the parallel dimension where the Fomor and the Tuatha De Danaan reside.