Sofa has joined the impressive crowd of Mac developers that will donate 100 percent of its sales to relief efforts in Japan. Sofa’s Dirk Stoop has three great apps Versions, Kaleidoscope, and Checkout. Starting now and ending at 4:00 am Thursday all proceeds will go to Doctors Without Borders, Habitat for Humanity and the Japanese Red Cross.

We were struck with horror when we heard about the earthquake and subsequent tsunami in Japan. Today, we’re asking you to join us in trying to help. Together we can contribute to restoring normalcy, even if it’s only a little bit.

Buy Apps for Japan [Sofa]