MEE6 - MEE6 is a multipurpose Discord bot with moderation capabilities, leveling, Twitch alerts, and an easy-to-use online dashboard.
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.
OwO Bot - OwO Bot is a simple software that allows you to organize your discord server on the basis of topic channels in which you can collaborate, share your opinions, thoughts, and feelings with your community members.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
YAGPDB - YAGPDB (Yet Another General Purpose Discord Bot) is an advanced configurable Discord bot providing a load of features for help with managing a server.
Slack - A messaging app for teams who see through the Earth!