Amazon Mechanical Turk
Amazon Mechanical Turk enables Requesters to employ Turkers Workers or Providers to execute Human Intelligence Tasks (HITs).
Requesters organize the use of human intelligence to execute tasks that computers are presently unable to do. Requesters can register in the Mechanical Turk website within a few minutes and assign tasks to workers.
Mechanical Turk Workers Turkers can work from home, select their own works hours, and receive payment for doing good work.
A Mechanical Turn Requester has access to 24×7 workforce, pays only for good results, and gets thousands of HITs completed in minutes.