Protobuf RPC Pro is a java protocol buffers RPC implementation featuring bidirectional RPC calls and TCP socket connection re-use and the option of secure communications.

MinLog is a Java logging library.

jWeb1T is an open source Java tool for efficiently searching n-gram data in the Web 1T 5-gram corpus format. It is based on a binary search algorithm that finds the n-grams and returns their frequency counts in logarithmic time.

The XAdES4j library is a high-level, configurable and extensible Java implementation of XML Advanced Electronic Signatures (XAdES 1.3.2 and 1.4.1). It enables producing, verifying and extending signatures in the main XAdES forms: ...

Provides editors for various Java bean object types, and a generic, customizable PropertySheet.

Thread Weaver is a framework for writing multi-threaded unit tests in Java. It provides mechanisms for creating breakpoints within code, and for halting execution of a thread when a breakpoint is reached.

Library for working with the Java 5 type system

The missing bridge between Java and native C++

A lightweight Java component nesting and docking system

Papaya for SLF4J: Utilities for Java 1.8+ written by Kevin Connor ARPE