Advanced Entity Extension provide manage custom entities and attributes.

Installation:

1 - Download and unzip extension contents on your computer and navigate inside the extracted folder. 
2 - Using your FTP client upload app directory to your store root.
3 - Refresh cache and index data

Frontend view:

For view your entities, you must go to "http://yourdomainname.com/index.php/your_entity_code/list".