Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Reminder - A better way to keep track of your reminders 📝
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Badgerton - The proactive reminder app for people with ADHD.
BibDesk - BibDesk is an organizational software created to help you edit and manage your bibliography. It keeps track of your bibliographic information as well as said information's associated web links and files. Read more about BibDesk.
Billisimo - Automated software renewal reminders for your team