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.
VideoScribe - Make your own whiteboard video animations with Sparkol VideoScribe – award-winning video scribing app for PC, Mac and iPad. Free trial available.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Doodly - Create your own doodle video in just 60 seconds
Slack - A messaging app for teams who see through the Earth!
TTS Sketch Maker - Create amazing whiteboard sketch videos with text-to-speech human-sounding voices in minutes!