Gdoc is a unique, integrated knowledge management and sharing system providing functionality to manage documents (DMS), users (UM), user assistance (TTS), common use-related issues (FAQ) and user-created-contents (WIKI) within any business process.
Features:
User Management: provides functionality to manage application users and their profiles
Document Management System: provides functionality to manage, save, catalogue and distribute projects and related documents
Trouble Ticket System: provides functionality to manage user assistance
FAQ: provides a list of questions and answers concerning common issues
WIKI: provides users with the possibility to create and edit interlinked pages
You can download a Gdoc free version on:
http://sourceforge.net/projects/gdoc/