Use Drupal to build everything from personal blogs to enterprise applications. Thousands of add-on modules and designs to build any site imaginable.

EtherPad web service allows real-time document collaboration for groups and teams. Etherpad can be re-branded with your own domain and company name.

KnowledgeTree is a document management software. Its features (including workflow, document alerts and version control) are designed to help organisations manage business processes around documents in addition to enabling file sharing among teams. The application is free and open source.

A wiki ( /ˈwɪki/ WIK-ee) is a website that allows the creation and editing of any number of interlinked web pages via a web browser using a simplified markup language or a WYSIWYG text editor. Wikis are typically powered by wiki software and are often used to create collaborative works.

Mumble is open-source, cross-platform voice over IP application. Its primary users are gamers, and it is similar to programs such as TeamSpeak and Ventrilo.

ProcessMaker is a simple, cost-effective, open source workflow software solution. Also known as business process management (BPM) software, ProcessMaker helps organizations of all sizes / types to easily design, automate, and deploy approval-based business processes.

SugarCRM is an open-source software-solution vendor which produces the Sugar Customer Relationship Management (CRM) system.

WordPress is web software you can use to create a beautiful website or blog.