We frequently use notation scales to give an opinion on something.

Some are automatic, like the Acid test, and some depends more on personal opinion (like video games).

Or if we get a better evolution on the ecological side (recyclable, power consumption, ...), we don't have a scaling system to define if an electronic/informatics  is open or closed/proprietary.

So I've decided to create a scale, and it will evolve :

librescale.php [en+fr] V1.0