Because I loved this project when it got posted some time ago on that currently dying other platform, I wanted to share this here as well.

G-Frames are a 3D-print project by slicelab. It is a aggressive frame built for riding flat with big wheel protection and a very unique, natural, kinda “grown” looking design pattern. I especially love the 2 colored contrast version.

It is available in different lengths and setups and: completely for free!
You just need to download the file and send it to a 3D printer.