ManualsLib - Just enter the keywords in the search field and find what you are looking for!
WebManuals.aero - Flight Operation Manual Authoring
Dozuki - Dozuki is a web-based tool for creating and distributing step-by-step documentation.
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
AeroDocs - Digital transformation, flight ops, document management, pilot efb, iPad, manual viewer, collaboration, controlled distribution, intelligent information.