光 HikariCP・A solid, high-performance, JDBC connection pool at last.

A collection of algorithms and data structures

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

Multi-platform transparent client-side encryption of your files in the cloud

Open source version of Google Authenticator (except the Android app)

XChange is a Java library providing a streamlined API for interacting with 60+ Bitcoin and Altcoin exchanges providing a consistent interface for trading and accessing market data.

Java implementation of the Tron whitepaper

Fast, scalable, self-contained, single-threaded Java web server

Stroom is a highly scalable data storage, processing and analysis platform.

Free TR-069 ACS that can run (mostly) anywhere.

Complete collection of code files (*.java/js/py/cpp/etc.) published on Project Nayuki website.

Java Filesystem Provider with integrated encryption

Interview prep with algorithms and data structures