Kalam Labs - Twitch for Science
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
RunaWFE - RunaWFE Free is a free Open Source BPMS (business process management system), which serves to optimize and automate business processes (for Windows, Linux, Mac OS).
Doit.im - Doit.
Litnerd - The Pixar for education, reading program for K-5 schools
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.