A general-purpose mathematical expression parser, which converts infix expression strings into postfix queues and/or syntax trees.

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.

ImageJ Operations: a framework for reusable algorithms.

Script Editor and Interpreter for SciJava script languages.