LeafPic is a fluid, material-designed alternative gallery, it also is ad-free and open source under GPLv3 license. It doesn't miss any of the main features of a stock gallery, and we also have plans to add more useful features.
TwelveMonkeys ImageIO: Additional plug-ins and extensions for Java's ImageIO
Open scientific N-dimensional image processing :microscope: :sparkler:
Published on Maven Central Java Library that compares 2 images with the same sizes and shows the differences visually by drawing rectangles. Some parts of the image can be excluded from the comparison. Can be used for automation QA tests.
Manage local photos on Android: gallery, geotag with photomap, privacy, tags, find, sort, view, copy, send, ... .