At this moment you can play around with RGB either using a CLI+RGB Node or using Bitcoin Pro (both through CLI or as a UI on your desktop). Here you can see many links with demos.
For example these ones:
- RGB Beta Demo
- Bitcoin Pro demo
Corresponding repositories are mentioned in the videos and the descriptions of them:
- Bitcoin Pro
- RGB NodeNB! Currently we are preparing a new release of RGB (still not the 'production' one), so some things may work not in a totally smooth way.