Jaxen is a universal XPath engine for Java

JFlex is a lexical analyzer generator for Java

JRobin is a 100% pure Java alternative to RRDTool

JSch is a pure Java implementation of SSH2

JZlib is a re-implementation of zlib in pure Java

Reflections - a Java runtime metadata analysis

Sun Java Streaming XML Parser (SJSXP) is the implementation of JSR 173

Efficient and customizable TreeLayout Algorithm in Java.

Java code for LZMA compression and decompression

JmDNS is an implementation of multi-cast DNS in Java

Java OpenJFX client application platform

Java library for FITS input/output

High level Java API for LevelDB

The Lightweight Java Game Library (LWJGL)

light weight and high performance Java caching library: core

Java 7+ toolkit to quickly develop RFC 4627 JSON compatible applications

Access Java based ipmi kvm consoles without a local Java installation.

a library of arguably useful Java utilities.

DNS library for Java and Android systems

A library of arguably useful Java utilities

Java API for working with archive files

GNU Prolog for Java is an implementation of ISO Prolog as a Java library

Serpent serializes an object tree into a Python ast.literal_eval() compatible literal expression. It is safe to send serpent data to other machines over the network for instance (because only 'safe' literals are encoded). There is also a deserializer or parse provided that turns such a literal expression back into the appropriate Java object tree. It is an alternative to JSON to provide easy data integration between Java and Python. Serpent is more expressive as JSON (it supports more data types).

OWASP Java Encoder

Java Advanced Imaging Image I/O Tools API core (standalone)

JPEG2000 support for Java Advanced Imaging Image I/O Tools API

SLF4J binding for java.util.logging, which was added in JDK 1.4

SOAP with Attachments API for Java (SAAJ) API (Eclipse Project for JAX-WS)

A collection of extremely fast and reliable parsers for Java

Commons components to manipulate core java classes

Apache Tomcat tool for migration from Java EE 8 to Jakarta EE 9

Default provider for JSR 353:Java API for Processing JSON

Checker Qual is the set of annotations (qualifiers) and supporting classes used by the Checker Framework to type check Java source code. Please see artifact: org.checkerframework:checker

The java-processing Racket package

@org.apiguardian.api.API Java annotation provider

Jacl is an implementation of Tcl written in Java

Java Object Layout: Core

Stringprep (RFC 3454) Java implementation

SCRAM (RFC 5802) Java implementation

Metrics is a Java library which gives you unparalleled insight into what your code does in production. Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment.

CUP Parser Generator for Java

Dependency injection for Java (JSR-330)

Java JsonPath implementation

Collection of Gentoo-specific tools for Java

Java language server

A collection of JUnit rules for testing code which uses java.lang.System.

A set of java classes to assist the tests for Guava itself

Java Concurrency Tools Core Library

A reference implementation of a JSON package in Java

Java OpenJFX client application platform