Heavy computation protocols and applications provide users with reliable and cheap computation.
Examples are: Golem TrueBit * Enigma Protocol
Golem
Overview
Golem is a global, open source, decentralized supercomputer that anyone can access. It is made up of the combined power of users' machines, from PCs to entire data centers.
Resources
TrueBit
Overview
TrueBit gives Ethereum smart contracts a computational boost. Don't let Ethereum's gas limit drag your imagination! A novel incentive structure guarantees fast, reliable, and affordable results without third-party trust.