Facebook has acquired Sofa, a software company based in Amsterdam, which created Mac apps like Kaleidoscope and Versions. In an announcement on Sofa’s blog, the company says:

We expected to keep working at Sofa forever. But after Facebook first made contact, we were quickly convinced to join forces.

The Sofa team will be moving from Amsterdam to Palo Alto in the coming weeks – and we’ll make sure to infuse some of our particular flavor of Dutch culture at Facebook.

Kaleiodscope and Versions aren’t part of the acquisition, but they’ll both remain available, as the firm says it’s working on “securing a great future for the outside Sofa.” They also say they’re working with a joint venture partner to provide a smooth transition and “best possible future” for its other products Checkout and Enstore.

A Facebook spokesperson said, as quoted by The Next Web, “We noticed their products and then found and met them at SXSW and realized our team values and cultures were really similar. Then we invited them to FB. Rest is history!”

In a statement, the company also said, “The team will contribute to a wide selection of the products that the design team works on. Typically, each Facebook product has a designer who is a core part of the team.”

It will be very interesting to see what Facebook features come of this acquisition. The financial terms have not been disclosed.