Dozuki - Dozuki is a web-based tool for creating and distributing step-by-step documentation.

ManualsLib - Just enter the keywords in the search field and find what you are looking for!

REWO - REWO is a knowledge documentation and distribution solution, which drastically improves capturing, visualizing and communicating knowledge.

Manuzoid - Repository that includes user manuals for various products

Bloomfire - Let Bloomfire help you get organized! Organize your content, build your company knowledge base and help your employees to be more successful.

ManualAgent - Manuals and guides