Fiverr - One marketplace, millions of professional services.
BOINC - BOINC is an open-source software platform for computing using volunteered resources
Upwork - Forget the old rules. You can have the best people. Right now. Right here.
Apache Mesos - Apache Mesos abstracts resources away from machines, enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.
TaskRabbit - TaskRabbit connects you to safe and reliable help in your neighborhood.
JPPF - The open source grid computing solution.