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.
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Bird Eats Bug - Saw a bug? Send an instant replay to engineers. It will come with console logs and everything. Developers will ❤️ you.
Slack - A messaging app for teams who see through the Earth!
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.