Facebook has hired the three people behind Pieceable Viewer, which is software that allows developers to demo their iOS apps on the web.

According to Pieceable’s website, Facebook is not acquiring the company, technology or customer data. This is similar to another recent “acqui-hires” of mobile photo sharing app Lightbox and UX design firm Bolt Peters. In these cases, the team joins Facebook and their existing companies and projects are dissolved. Pieceable says its viewer will be available until Dec. 31, and an open source version will be offered to developers in the fall.

Pieceable did not indicate what area it would focus on at Facebook, except saying, “We can’t wait to begin working with the Facebook team to help our friends, family, and more than 900 million others connect and share in new ways.” The team could become involved somehow with Facebook’s mobile platform, however since Pieceable built desktop software, it might become part of another project.

Pieceable Viewer made it easier for developers to test and demo their iOS apps by creating web-based versions that used Flash to simulate app functionality. See a sample here. The team also developed a visual editor for people to create mobile apps without writing code.

The company began last year with seed funding from I/O Ventures. The team has only three employees: co-founders Bob Ippolito, Fred Potter and Jameson Hsu. Ippolito and Hsu had previously co-founded in-game advertising network and payments platform Mochi Media, which was acquired by Shanda Games in 2010. Potter had founded BerryStore, which let users browse, download, rate and review Blackberry apps. That company was acquired by Mogees in 2009.