Vabotu - More than slack. More than Trello. FREE.
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.
Do - Do helps you run productive meetings. Do work you love.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Kurator - The premier Chrome extension for savvy researchers and publishers alike. Curate your interest and publish to your website, newsletter and social media sites directly from the browser.
Slack - A messaging app for teams who see through the Earth!