Free and open source image board browser
Fuck Storage Access Framework (or just FSAF) is a handy library that hides away from you all the annoying parts of the Storage Access Framework (like DocumentTrees / DocumentIds / DocumentFiles / DocumentContracts and other bullshit) leaving only an API that is similar to good-old Java File API
Image loader with ability to cache loaded images on disk, apply transformations and show them in a JavaFX's ImageView
An app that allows you and a random stranger to exchange photos of any thing you find interesting