The Clojure programming language

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web crawler project.

Soot - A Java optimization framework

Simple, high-performance event-driven HTTP client+server for Clojure

Elegant parsing in Java and Scala - lightweight, easy-to-use, powerful.

A pure-Java Markdown processor based on a parboiled PEG parser supporting a number of extensions

ditaa is a small command-line utility that can convert diagrams drawn using ascii art ('drawings' that contain characters that resemble lines like | / - ), into proper bitmap graphics.

Java Agent for Memory Measurements

MarkdownJ

A Doclet that allows the use of Markdown in JavaDoc comments.

📋 A Javadoc Doclet based on Asciidoctor that lets you write Javadoc in the AsciiDoc syntax.