ManualsLib - Just enter the keywords in the search field and find what you are looking for!
Laserfiche - Laserfiche offers powerful document management software solutions that are easy to implement and easy to use.
Manuzoid - Repository that includes user manuals for various products
DocuWare - DocuWare is a next-gen document management system that is specially designed for transferring paper-based and digital assets into collective resources.
ManualAgent - Manuals and guides
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.