jOOQ is the best way to write SQL in Java

The Jdbi library provides convenient, idiomatic access to relational databases in Java and other JVM technologies such as Kotlin, Clojure or Scala.

Dynamic Code Evolution VM for Java 7/8

alf.io - The open source ticket reservation system for conferences, trade shows, workshops, meetups

EnvFile 3.x is a plugin for JetBrains IDEs that allows you to set environment variables for your run configurations from one or multiple files.

https://openjdk.org/projects/wakefield

Capacitor plugin for storing string values securly on iOS and Android.

OpenSeedbox - Open Source Multi-User Bittorrent Web UI

Nutrition tracker; fork of the old Java-based Cronometer with better macOS support and newer USDA database

Fork of the Play1 Framework

Blocking pipelined db interface for Postgres on the JVM

An example of a RePlay project.

Play module to speed up development of large code bases with Play 1.x framework