demoparty.net is based on a lot of open source software.
- Venue information powered by Foursquare
- Placename data from Geonames under CC BY 4.0
- Place information powered by Google
- scene.org Archive
- Wayback Machine
- API Platform
- Easy Coding Standard
- Font Awesome
- Map Marker by Wayne Middleton from the Noun Project
- PT Serif by ParaType
- unDraw illustrations
This is an incomplete list.