Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.
Annotate.tv - Optimize your learning on YouTube
ToDoBot - Slack-native todos right in your Home Tab
Slid - Capture knowledge from online videos, courses, and webinars
Done? - A TODO list for productivity and procrastination lovers
SkillTube - A curated list of best courses from YouTube & other platform