Searching for Power BI add-in and feature i found online an interesting website where you can find and test all the power bi visualization on PC, Tablet and Phone .
I suggest you to try it on this link.
The page have this structure:
On the left tab you can select:
- Visual: select custom visual that you want to know
- Data view ( for now we have only one type)
- Randomize: we can randomize number to view how change report
- Show Animation: show animation features if exist on custom visual
- Show Interaction: Show interaction of different visual