SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.

ImageJ2 is a rewrite of ImageJ for multidimensional image data, with a focus on scientific imaging.

Script Editor and Interpreter for SciJava script languages.

A runtime patcher to introduce extension points into the original ImageJ (1.x). This project offers extension points for use with ImageJ2 and it also offers limited support for headless operations.

Fiji is a distribution of ImageJ for the life sciences.