Item Creator is a program designed to simplify the management of inventory systems for the GameGuru engine. It allows you to create and export inventory items using a visual interface, and also allows you to import and edit already created items.
Item Creator supports the following inventory systems:
https://www.tgcstore.net/product/34350
https://www.tgcstore.net/product/34408
https://www.tgcstore.net/product/35241