If you are small or mid-sized organisation looking for the project management application, I'd recommend you to have a look at this application. Besides the basic features, such as project management (tasks, milestones, tasks), communication tools (chat, forums, wiki) it offers Documents module with the possibility to create and edit the documents online. We work with a big amount of documentation and this possibility eases a lot our documentation workflow. You may share the documents and manage the access rights.