StepShot - Make knowledge sharing more time-efficient!
ManualsLib - Just enter the keywords in the search field and find what you are looking for!
HelpSmith - HelpSmith is a help authoring tool to create CHM HTML help files, manuals, and PDF documents.
Manuzoid - Repository that includes user manuals for various products
FastHelp - FastHelp is a Windows Help File Generator that produces online and offline documentation.
ManualAgent - Manuals and guides