BOINC - BOINC is an open-source software platform for computing using volunteered resources
SEOClerks - The largest SEO Marketplace on the planet. - SEOClerks
Charity Engine - Charity Engine takes enormous, expensive computing jobs and chops them into 1000s of small pieces...
Picoworkers - Earn money from doing short, easy tasks similar to Microworkers. Picoworkers is the best alternative to Microworkers I ever find.
Apache Mesos - Apache Mesos abstracts resources away from machines, enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.
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.