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.

Script Editor and Interpreter for SciJava script languages.

ImageJ Operations: a framework for reusable algorithms.