MadCap Flare - Documentation for Any Audience, Language or Format
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.
ClickHelp - Create, translate, and publish technical documentation easily in one portal, anywhere in the world!
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Adobe RoboHelp - Adobe RoboHelp empowers organizations to deliver engaging help and policy content across mobile devices, formats, and platforms.
Slack - A messaging app for teams who see through the Earth!