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

Event Calendar App - A simple, easy to manage, way of displaying events

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

Plan - Plan is a better way to organize.

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

Whenever - Casual calendar app for iOS