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

Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.

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

Task List - Personal task manager and to-do list app for iPhone and iPad

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

Best Reminder App - Why not use the browser to remind you of things?