Transversal - Transversal offers cloud-based knowledge management solutions.
Dr.Explain - Dr.Explain software is a help file authoring tool.
Knowledge Plaza - Knowledge Plaza is a SaaS Platform dedicated to Social Knowledge Management.
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
WinCHM - Creating CHM file, Make CHM file, Web Help. WinCHM Pro - Help authoring software (CHM, WebHelp, DOC, PDF) . With this powerful tool you can not only create chm file from scratch, but also convert a set of existing HTML files to a chm file.