ManualsLib - Just enter the keywords in the search field and find what you are looking for!
Orlando TechPubs - Orlando Suite for Tech Pubs is a multi-standard & multi-format software solution to store, edit, publish, distribute and view Airlines, Manufacturers and MRO Technical Publications.
Manuzoid - Repository that includes user manuals for various products
Centrik - Centrik is an intuitive and powerful operational management system that provides you with the tools you need to manage your business
ManualAgent - Manuals and guides
WebManuals.aero - Flight Operation Manual Authoring