KnowledgeTree is a powerful Web-based document management system built on the popular LAMP (Apache/MySQL/PHP) stack. It is a leading PHP-based commercial document management software project. KnowledgeTree is used by Fortune 500 companies, community organizations, local and state governments, and educational and scientific institutions around the world.
Plone is a content management system that is simple to set up, maintain, and modify. It is designed to be a corporate-ready content management system. It is ideal as an intranet and extranet server, as a document/Web publishing system, and as a groupware tool for collaboration between separately located entities. It aims to be a proper content management and publishing system, sharing the same qualities as Teamsite, Livelink, and Documentum.
TWiki is a flexible, powerful, and simple Web based collaboration platform. It is suitable for dynamic intranets and knowledge bases, and for sharing and managing documents and collaborative projects. It resembles a normal Web site, but every page can be changed from a browser. It features automatic link generation, full text search, group authorization, Web forms, reporting, change notification, file attachments, revision control of pages and attachments, a modular templating system with skins, hierarchical navigation based on the topic parenting feature, and more. Plugins can be used to enhance the program and build groupware applications.
Interleave is a Web-enabled business process automation application. It enables you to model your business process like purchasing, project management, and contract management and make it available online. It's meant to replace processes which currently rely on paper, email, or spreadsheets and it has a very good workflow engine. You can create invoices, export to RTF and PDF based on templates, export to MS Excel, interpret incoming email, and publish your data to the Web.
Epiware is an AJAX-enabled Project and Document Management application that provides access to a complete set of file management functions, including document check-in, check-out, version control, approval, change notification, and access history. It enables the creation of virtual teams by providing an online workspace for users to collaborate and exchange information in a secure, protected setting.