The Blue Lantern Corps (DC Comics) use high quantities of hope to a variety of effects through their power rings.
Larfleeze of the Orange Lantern Corps (DC Comics) makes extensive use of the orange emotional energy of avarice through his power ring.
The Red Lantern Corps (DC Comics) merge mystical rage with technology to forge their rings.
As a being from a universe before the primary one, Relic (DC Comics) possesses highly advanced technology that can interact with the emotional electromagnetic spectrum used by the Lantern Corps and adapt mechanical apparatus's from any material semblance to best harness and focus it.
The Sinestro Corps (DC Comics), masters of several fear-inducing technologies.
The Dark Eldar (Warhammer 40,000) excel at the creation and use of a variety of technologies to capitalize on feelings of horror or dread.
A Nightmare Shroud (Warhammer 40,000), a cloak filled with the worst terrors of a thousand aeons.