Wikipedia
WikiEducator is an international online community project for the collaborative development of learning materials, which educators are free to reuse, adapt and share without restriction. WikiEducator was launched in 2006 and is supported by the non-profit Open Education Resource (OER) Foundation. A variety of learning resources are available on WikiEducator: direct instructional resources such as lesson plans and full courses, as well as learning-support resources, such as individual school portals and funding proposals.
WikiEducator's stated goal is to build a thriving and sustainable global community dedicated to the design, development and delivery of free content for learning in realisation of a free version of the education curriculum by 2015. The project purports to focus on building capacity in the use of MediaWiki and related free software technologies, developing free content for use in educational institutions and elsewhere, facilitating the establishment of community networks and collaboration, and fostering new technologies.