3DBenchy is a 3D model specifically designed for testing and benchmarking 3D printers. It is a small recognizable object that you can download for free, make and share.

http://www.3dbenchy.com/

Print instructions

Maybe you have seen on some prints the infamous Benchy hull line. We eliminated that in our presliced gcode. Check the article, how we did that.
The Benchy hull line