HUD / UI common way

I’ve been searching for the common way to develop HUD / UI.

There are a lot of tools / framework like Coherent UI / GT, Scaleform, BLUI and other.

We’re a indie development team, so we’re looking in best case for a free solution.

Some of the tools using flash, other using websites. What is the best way (performance, developing)? Same here, best case will be with blueprint access.

The other issue is, we’re developing mobile games, so the HUD / UI have to bee scaleable / responsive and compatible with Android, iOS,…

I’ve looked alredy in google but didn’t found anything about it.

Thanks for your help!