XWiki is a Java open source software development platform based on the wiki principles, under a LGPL license. In addition to being a full-featured wiki, it is also a second generation wiki allowing collaborative web applications to be written easily and quickly. On top of this platform several products are developed, targeted mainly on aiding enterprise-level needs. XWiki has a vibrant community of developers and users. The community is made of individual users as well as companies around the world which are using XWiki for Intranets and Communities. One example of an important project built on top of XWiki is Curriki (http://www.curriki.org) which is open source itself and hosted inside XWiki's source repository. Curriki is an online service for creating and sharing open education resources (based on XWiki and the Google Web Toolkit).