Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
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.
FastStone Capture - A powerful, lightweight, yet full-featured screen capture tool that allows you to easily capture...
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
MWSnap - MWSnap is basically a free to use Windows snapping tools that are used for snapping any part of the screen that is currently displaying on the front of all opened programs and windows.
Slack - A messaging app for teams who see through the Earth!