Guard is a command line tool to easily handle events on file system modifications.

Open-source Dropbox using Ruby and Git.

Wrapping of microstation using win32ole to automate and control from ruby

Timeless comes with a pomodoro timer, with a standard stopwatch (start, top), semantic tags in notes (projects, clients, activites), and reporting and exporting command. Data is stored in csv and it can be easily imported into a spreadsheet.