freshmeat.net: Project details for KnowledgeTree
“KnowledgeTree is a feature-rich document management system featuring knowledge management, document version control, hierarchical document management, support for common file formats (MS Word, MS Excel, PDF, TXT, HTML), extensible meta data, creation of custom document types, application managed document links that guarantees consistent data and eliminates emailing documents, easy publication of documents, subscription agents, archiving according to expiry date, expiry time period, or utilisation for enhanced speed, and much more.“
May be of interest to teknoids looking for a less expensive solution to knowledge management.