The Google Data Java client library is written by Google.

JavaMail API for sending and receiving emails using standard protocols like SMTP, POP3, and IMAP, supporting both text ...

The Apache Commons IO library contains utility classes, stream implementations, file filters,

dnsjava is an implementation of DNS in Java. It supports all defined record types (including the DNSSEC

Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are ...

GWT-compatible widgets, browser abstractions, and JRE implementations for use in client applications.

API for SLF4J (The Simple Logging Facade for Java) which serves as a simple facade or abstraction for various logging ...

Java object graphs, to and from YAML

General data-binding functionality for Jackson: works on core streaming API

Annotations the SpotBugs tool supports

Microsoft JDBC Driver for SQL Server.

MySQL Connector/J is a JDBC Type 4 driver, which means that it is pure Java implementation of the MySQL protocol and ...

Provides the API for creating and building SOAP messages.

Core module of Apache Velocity, a Java-based template engine for generating text output.

Generic tools that can be used in any context.

Wicket is a Java web application framework that takes simplicity,

Wicket Extensions is a rich component library for the Wicket framework.

Compiler, Test runner, Development mode, and other tools for developing GWT applications

Hibernate's core ORM functionality

jOOQ generates Java code from your database and lets you build type safe SQL queries through its fluent API.

OpenBSD-style Blowfish password hashing for Java

PostgreSQL JDBC Driver Postgresql

Spring WS Core

Java(tm) library to manage Subversion working copies and repositories

Implementation of the SLF4J API for Logback, a reliable, generic, fast and flexible logging framework.

Javassist (JAVA programming ASSISTant) makes Java bytecode manipulation

JUnit Jupiter is the API for writing tests using JUnit 5.