Fiverr - One marketplace, millions of professional services.
UnitedMasters - Creator tools for artists to get smart, get fans, get paid
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Picoworkers - Earn money from doing short, easy tasks similar to Microworkers. Picoworkers is the best alternative to Microworkers I ever find.
Field Engineer - Field Engineer is an online marketplace that connects businesses who have jobs with Telecom Engineers who have the skills and availability to complete them.