Whip

Whips were tools primarily used to control animals or slaves.

The leader of the Sycorax invasion of Earth in 2006 carried a death whip with him, which he used to kill Daniel Llewellyn and Blake. However, it proved ineffective against the Tenth Doctor, who effortlessly caught the weapon in his hand. (TV: The Christmas Invasion)

Robomen carried whips with them to control the Daleks' human slaves. (TV: The Dalek Invasion of Earth)

The Huntsman used a whip to control Lady Adrasta's wolfweeds. (TV: The Creature from the Pit)

Mandrel tried to attack Leela with a whip, but was stopped when Cordo arrived. (TV: The Sun Makers)

On Eros, trials by combat were conducted with whips. The Eighth Doctor witnessed one such duel, then fought in one himself with Zoleon. (PROSE: The Queen of Eros)