OpenWGA is an open source java based CMS that supports the software development process by delivering all necessary tools to create, develop, deploy and share web applications.
Limited extensions or plugins available. Some custom programming may be necessary.
Management of content and data is relatively straight forward, but there may be a bit of a learning curve. Some programming experience may be required.
Has a smaller active community. Limited support is available either for free or as a paid service. Adequate documentation is available.