Watermarker's primary purpose is to process photos from master files into publication-ready files, including a custom "watermark" (semi-transparent text), which could be a copyright notice or another form of attribution.
Peanut is a tiny JPEG comment editor that is easy to integrate with image viewers that support custom actions, such as Mirage and GQview.
Tight sandboxes for Lua.
A panted aquarium fertilizers calculator.