There are many extras available for Shopp, both officially supported extras from Ingenesis Limited and unofficial extras developed by others. Officially supported extras are paid add-ons to Shopp developed, maintained, documented and supported by Ingenesis Limited.
Extras developed by others may be free (in cost) or paid depending on the developer. You can find links to download or buy extras from other developers in the Extras directory on shopplugin.net.
There are also several types of extras that can be found in the extras directory including: