Peanut is a tiny JPEG comment editor that is easy to integrate with image viewers that support custom actions, such as Mirage and GQview.
IMGCrush is an image compressor. IMGCrush_GUI is a simple GUI for IMGCrush. IMGCrush can perform both lossy and lossless compression in order to achieve the file size or quality that the user requires.
A database version control system.
A library of synchronization primitives and concurrent data structures for specific update-heavy workloads.