SEOClerks - The largest SEO Marketplace on the planet. - SEOClerks
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.
Picoworkers - Earn money from doing short, easy tasks similar to Microworkers. Picoworkers is the best alternative to Microworkers I ever find.
21 Lists - Send and receive targeted, paid microtasks
Meetings Are Dead - People spend most of their time on meetings, where they are not needed, being unproductive.With MAD(Meetings Are Dead) you can assign real tasks and problems to relevant people, while others can continue their work.
Fiverr - One marketplace, millions of professional services.