ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Generate diagrams from textual description

Backport of Java 8's lambda expressions to Java 7, 6 and 5

FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)

A High Dynamic Range (HDR) Histogram

fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues.

A cross-platform java application for decoding, monitoring, recording and streaming trunked mobile and related radio protocols using Software Defined Radios (SDR). Website:

XChart is a light-weight Java library for plotting data.

Java Abstracted Foreign Function Layer

Janino is a super-small, super-fast Java™ compiler.

A 2D chart library for Java applications (JavaFX, Swing or server-side).

LZ4 compression for Java

Java Collections till the last breadcrumb of memory and performance

High Performance Primitive Collections for Java

oj! Algorithms

Chronicle Bytes has a similar purpose to Java NIO's ByteBuffer with many extensions

Mirror of Apache Velocity Engine

Convert Java to JSON. Convert JSON to Java. Pretty print JSON. Java JSON serializer. Deep copy Java object graphs.

A gulp of low latency Java

Java Core Library for Real-Time and Embedded Systems

A Java UI toolkit

Marlin is the FAST Java2D antialiasing rasterizer derived from OpenJDK Pisces (shape)

Randomized Testing (Core JUnit Runner, ANT, Maven)

A Graphics2D implementation targeting Skija as a backend.

This Java project includes classes related to desktop applications, Swing, performance, image processing, data structures, and other misc topics.

XOM™ is a new XML object model. It is an open source (LGPL), tree-based API for processing XML with Java that strives for correctness, simplicity, and performance, in that order.

JIDE Common Layer

A Java and JavaScript charting package

A UI Builder for SnapKit using a novel language and selection based approach

Graphics2D wrapper for JOGL