DocMGR

It allows for the storage of any file type, and supports full-text indexing of the most popular document formats.

It has access control lists, user permissions assignment, file discussion board, and multi-level file grouping.

It is also available in many language packs for user localization.

DocMGR runs on PHP, the Apache webserver, and Postgresql. It optionally uses tsearch2 for full-text indexing which provides for faster search results and result ranking.

DocMGR supports LDAP authentication, the ability to easily add and remove "objects" for storage in the system, document workflow, object subscriptions, WebDAV access, and an ever-growing set of features revolving around content storage.