Portfolio Prioritization by 500talents - Jira plugin to accelerate your product portfolio
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Nifty - Manage projects, work, and communications in one place.
TaskPaper - Plain text to-do lists for Mac
Sunsama - Calendar and scheduling for teams
Magnetic - Magnetic is an all-in-one agency management software built for productivity.