Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
ManualsLib - Just enter the keywords in the search field and find what you are looking for!
ProProfs Knowledge Base - ProProfs Knowledge Base is a cutting-edge knowledge management software that assists businesses to reduces support tickets by self-help and create online manuals, guides, wikis, documentation, FAQs and more.
Manuzoid - Repository that includes user manuals for various products
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
ManualAgent - Manuals and guides