Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
Journalistic - A simple, yet powerful micro journaling app
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Nomie - Open-source mood and life tracking
Redmine - Flexible project management web application
Cactus - Static site generator for designers. Uses Python and Django templates.