doo VS Note Board

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Synology Note Station - Without needing to spend money on Evernote, Synology Note Station provides a desktop client to organize all your random notes in one place.

Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.

Pocket Lists - World’s Friendliest To-Do List App

Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.

Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.