This list provides for discussion on using QGIS, including troubleshooting. It serves as the primary user community support mechanism for Quantum GIS. To see the collection of prior postings to the list, visit the Qgis-user Archives.
The Google Earth Engine Developers Discussion List
This is the primary venue for direct support of Google Earth Engine. The forum has been around for many years and has an incredibly useful archive, as well as being populated and monitored by the GEE developer teams, themselves. Very active, with short waits for responses.