Anthony Webb produced and published a nice Demo PCB on OpenPNP Github:
https://github.com/openpnp/openpnp/tree ... mo%20Board
Look for "Demo Board V2" Gerbers.
The PCB is double-sided and contains many packages / footprints commonly used (no QFN or BGA though).
Edit: There is actually a QFN32 on top layer; missed that on first glimpse
![Wink ;-)](./images/smilies/icon_e_wink.gif)
The copper layer also includes features to calibrate the camera and check for distortion (mm rulers + square of known size).
Pictures:
I think this might be very useful for testing, calibrating and benchmarking any PnP - including our beloved LitePlacers
![Very Happy :-D](./images/smilies/icon_e_biggrin.gif)
Best regards
Malte