Cointin Maxime (Kraven30)
has developed couple of years ago for XOOPS 2.6.0
an Extension called "Rating"
This extension allows you to easily add a voting system to the inside of your modules. You can add as many modules as you want. For example, to rate a hotel, restaurant service, quality of food, price, etc..
It can be used by any XOOPS 2.6.0 module, it works the same way as the module Tag. It uses the jQuery plugin 'jRating'.
Since XOOPS 2.6.0 went through several changes, I have updated this extension, similar to the 6 modules developed by DugrisDownload: our repository on GitHub
Please fork it, test it, improve it, and contribute back to XOOPS
I'll write a tutorial for the usage of this extension hopefully next month.