EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

gitsome - Supercharged Git/Shell autocompleter w/ GitHub integration

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Kite - Kite helps you write code faster by bringing the web's programming knowledge into your editor.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

YOURLS - YOURLS is a website that contains all the tools you need to create and launch your very own URL shortener. URL shorteners like bitly or TinyURL are fine for public use, but they offer limited options in terms of URL customization.