Alfresco in the Cloud!

HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful.

eXo Platform is a cloud-ready enterprise portal and user experience platform-as-a-service (UXPaaS) for building and deploying transactional websites, managing web and social content and creating gadgets and dashboards. Built on open standards and open source technologies, eXo Platform has the features and extensibility of a UXP and the cloud architecture to build public and private clouds.

Liferay Portal is an enterprise web platform for building business solutions that deliver immediate results and long-term value.

Unlike other full-stack frameworks available on the market, the platform offers a higher level of abstraction and a wider range of out-of-the-box features, while still allowing direct access to the low-level API.

"Centralpoint goes beyond being an omnichannel communication platform to push information to each user based on their audience and role. Centralpoint also collects and harvests their user activity, resulting in rich Business Intelligence, Gamification, and reporting. "

Online cloud document management system software.