Stepoko: Powered by grbl Hookup Guide
Software: Machine control (Universal G-code Sender)
Once G-Code files have been created, a program is needed to parse them and issue the commands to the Stepoko. A good open source one that works well with the Stepoko (and all grbl hardware) is Universal G-Code Sender.
As of writing this, 1.0.9 is the latest stable build. Most people will want this as a zip archive rather than having the github source. Download it, unzip it into a directory, and run the batch file for windows, or shell script for mac/linux.
Make sure you are connected to the Stepoko. Once the program is loaded, you can set the connection parameters, and click 'Open' to get a connection to the mill. Use 115200 baud and the port that appears when you attach the Stepoko. If all goes well, the grbl firmware will reply with its version number.