Runway uses components licensed under the GNU LGPL and other open-source licenses.

FFmpeg
Runway uses code from FFmpeg licensed under the LGPLv2.1 and its source can be downloaded here.

Google Fonts

Runway uses fonts from google fonts under SIL Open Font License, 1.1 (OFL), Apache License, Version 2.0 and Ubuntu Font License, 1.0 licenses. https://fonts.google.com/attribution.