You can load a .zwo workout or a .fit Course file.
NOTE: .fit workouts and gpx files are currently NOT supported.
Rundløype is a modified version of Auuki by Dimitar Marinov. Source code for this version: github.com/larserikfinholt/web-trainer.
Auuki is an open-source project. For more information, please visit the github page. There you can get support or join the discussions.
Latest version: 0.3.9
Old stable version still available here: 0.1.43