Calendarist - Time blocking companion for Google Calendar
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Tactical Time Blocker - Daily highlights & adaptive time blocking template
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Taskful - Deadlines, meet your match.
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.