BuddyPress Docs adds collaborative documents to BuddyPress. This means that a person can create a document that can be edited by multiple people.
Plugin Review – BP Group Documents
BP Group Documents is a BuddyPress Groups plugin that creates within each group a document storage area which includes a list view of all documents and descriptions together with a category search feature. The plugin also includes Widgets that allow for the display of various aspects of your BP Group Documents install.