ManualsLib - Just enter the keywords in the search field and find what you are looking for!
Dozuki - Dozuki is a web-based tool for creating and distributing step-by-step documentation.
ManualAgent - Manuals and guides
ClassVR - VR Training Simulator
Manuzoid - Repository that includes user manuals for various products
ScreenSteps - IT Training Docs For Your Cloud Implementation. Use ScreenSteps when your company implements new cloud technology and you need training docs