This is "Custom Option Images" addition for apparel stores.
It adds ability to add (upload) images for custom product options.
So if you have an apparel store you can add custom option Color and upload small images for each color option.
Then if a customer selects the Color option he will see the small image above the option Drop-down (Check Boxes, Radio buttons, Multiple Select).

Of course you can use it not only for apparel stores. You can add as many custom options with images as you need.
Each image can be opened in a popup window when customer click it.
It is easy to browse, upload and delete images in magento admin panel on the Edit Product page.

Installation instructions:
For Magento 2 README.html
For Magento 1.x README.html


Frontend:
/demo/m23_oi/htc-touch-diamond.html


Frontend:
hottons.com/demo/m19/electronics/cell-phones/htc-touch-diamond.html