ZCast - Live interactive podcasting with your Twitter followers
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Anchor.fm - Record bite-sized podcasts that anyone can join ⚓
Org mode - Org: an Emacs Mode for Notes, Planning, and Authoring