Stackshare - StackShare is a comprehensive website that gives its users the chance to organize and share their technology stack with the rest of the community.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Techmap.io - Techmap is a workplace search engine to find companies using technologies (e.g., Rails, PHP, Java, etc.) that are used internally. Finally, a "Google for Workplaces" that helps people find a place to work with technologies they love!
TaskPaper - Plain text to-do lists for Mac
xZeitgeist - The most popular tweets categorized and ranked, every day
Magnetic - Magnetic is an all-in-one agency management software built for productivity.