humit - A social networking app for music sharing and discovery.

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

Cymbal - Music discovery powered by friends

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

Better Notes - Simple notes app that ties notes together with #hashtags

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