Confluence is particularly recommended for medium to large-sized organizations, software development teams, and businesses that utilize other Atlassian products. It's ideal for groups that require advanced documentation features, seamless integrations, and strong collaboration tools to optimize their workflows.
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Dr.Explain - Dr.Explain software is a help file authoring tool.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
MadCap Flare - Documentation for Any Audience, Language or Format
Slack - A messaging app for teams who see through the Earth!