Exhibit 21

Subsidiaries of Boomerang Systems, Inc. as of September 30, 2012:

Boomerang Sub, Inc.

Boomerang USA Corp. f/k/a Diamond World Funding Corp.

Boomerang MP Holdings, Inc.

Swingstation, Inc. ⁽¹⁾

Dominion Cellular, Inc. ⁽¹⁾

Diamond Leasing and Management Corp. ⁽¹⁾

⁽¹⁾ This company is inactive and in the process of being dissolved.