Spare5 - Earn money in your spare time with our free web and mobile apps.
Amazon Mechanical Turk - The online market place for work.
Bitfortip - Tip Bitcoins as an incentive | Earn Bitcoins for being helpful
SerpClix - SerpClix is a click exchange network used to send more real clicks to your Google SERP. You can click to earn money or buy clicks to rank higher on Google.
Crowdin - Localize your product in a seamless way
Testable Minds - Testable Minds is the platform used by researchers from the world's leading universities to recruit participants for their psychological and behavioral experiments.