Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Tyke - Mac menu bar app that @torrez really needed to take notes
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.