Does Crow Pi3 have Pin diagrams, example code, library references?
Here is the pin table: https://www.elecrow.com/wiki/crowpi_3.html;
The sample code and library files are all within the system of crowpi 3:
Code: /usr/share/code/
Library: /usr/local/lib/pythonXX/dist-packages/

Comments
Yes. CrowPi 3 pin diagrams are available on Elecrow’s wiki.
Example code is located at /usr/share/code/ and the related libraries are installed under /usr/local/lib/pythonXX/dist-packages/ on the system.