Shelf.io!

Basecamp is a web-based project collaboration tool that allows groups of people to share files, meet deadlines, assign tasks, and centralize feedback.

SugarSync lets you synchronize, backup and remotely access files and folders across your PC or Mac. You can also remotely view files from Windows Mobile, Blackberry, iPhone, Symbian and Android.

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

Tiki Wiki CMS Groupware is a full-featured, web-based, multilingual (40+ languages), tightly integrated, all-in-one Wiki+CMS+Groupware, Free Source Software (GNU/LGPL), using PHP + Smarty, MySQL, Zend Framework, jQuery and Bootstrap. Tiki can be used to create all kinds of Web applications, sites, portals, knowledge base, intranets, and extranets. It is actively developed by a very large international community.

Trusted by 8,000 businesses, Confluence is the leading collaboration software and enterprise wiki for intranets and knowledge management. Free 30-day trial.

Alfresco is the leading open source enterprise content management system built by the most experienced team in the industry drawn from Documentum®, Vignette® and Interwoven®. Twenty years of experience drove us to believe that the Enterprise Content Management industry was driven by:

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.

Nuclino is the easiest way to organize and share knowledge in teams. Create real-time collaborative documents and connect them instantly like a wiki. Use the tree, board, and graph view to explore and organize your knowledge visually. It's great for meeting notes, product requirements, docs, decisions, and more.

XWiki is a powerful Open Source collaborative platform allowing companies of all sizes to save time and money while enhancing collaboration on both team and organizational level. Being focused on efficient communication and collaboration, XWiki redefines the value of business knowledge by allowing any user to access critical information in a fast and efficient way while reducing the organizational silos.

Open Atrium is an installation profile for Drupal.

The easiest way to collaborate on projects and ideas. MOOVIA is an enjoyable and secure social environment to host your team`s projects, tasks, meetings, ideas, messages and documents. It's a social collaboration platform designed for teamwork that improves communication, productivity and engagement.