https://f-droid.org/ https://f-droid.org/: Open source, the apps they list include the following: "This version is built and signed by F-Droid, and guaranteed t

https://f-droid.org/ https://f-droid.org/: Open source, the apps they list include the following: "This version is built and signed by F-Droid, and guaranteed to correspond to the source tarball below."