List of Powers that use Knockback
Overview
Below is a list that utilizes the knockback mechanic somehow: causing it or protecting against/resisting it.
Powers That Cause Knockback

Toggle Resistance, Team
This power is available to Archetype through the Power Set primary/secondary power set/power pool.
Powers Against Knockback
Protecting Self

Toggle Resistance, Team
This power is available to Archetype through the Power Set primary/secondary power set/power pool.
Protecting Ally

Toggle Resistance, Team
This power is available to Archetype through the Power Set primary/secondary power set/power pool.
Inspirations Against Knockback

Resistance+Protection, Self
This inspiration protects against and provides resistance to sleep, hold, immobilization, disorient, fear, confuse, knockback, repel, taunt, and placate.

Resistance+Protection, Self
This inspiration protects against and provides resistance to sleep, hold, immobilization, disorient, fear, confuse, knockback, repel, taunt, and placate.

Resistance+Protection, Self
This inspiration protects against and provides resistance to sleep, hold, immobilization, disorient, fear, confuse, knockback, repel, taunt, and placate.

Resistance, Self
This inspiration provides resistance to sleep, hold, immobilization, disorient, fear, confuse, knockback, repel, taunt, and placate.