Drifting Ruby is a screencast site with a collection of short videos covering application specific tasks.

Futo is an easy to use and online budgeting tool. You can track your incomes, debts, bills, and expenses. With helpful tools like the calendar and debt interest calculator, never miss another payment and know how much interest you are paying in per month.

Rotor (Ruby Motor) is a toy gem that I used for controlling Unipolor and Bipolar stepper motors. It supports basic funtionality to interpret GCode and translate it into real movements.