Microsoft 365 - Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online
Dr.Explain - Dr.Explain software is a help file authoring tool.
Apache OpenOffice - Apache OpenOffice is an open source, office document productivity suite.
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
SSuite Office - SSuite Office is called to be one of the most accomplished software developers for both beginners and professionals alike.
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.