This extension allows you to manage applications on products similar to the categories. In general, if you see phone products, you can define the category "Battery" (for example) and enter different applications "sony, apple, htc, etc ...".

Demo ADMIN:
http://www.p3a-group.com/demo/opencart-1.5.6.4/admin/index.php?route=common/login
username: demo
password: demo

Demo CATALOG:
http://www.p3a-group.com/demo/opencart-1.5.6.4/index.php?route=common/home