Design patterns implemented in Java

Free universal database tool and SQL client

Getting Started with Spring Boot 3:

An image loading and caching library for Android focused on smooth scrolling

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

Apache Flink

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

Modular and customizable Material Design UI components for Android

Powerful and flexible library for loading, caching and displaying images on Android.

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

A free, secure and open source app for Android to manage your 2-step verification tokens.

Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.

1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java

jOOQ is the best way to write SQL in Java

Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.

Barcode scanner library for Android, based on the ZXing decoder

Java library to create bots using Telegram Bots API

Apache Calcite

Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance

OpenStreetMap-Tools for Android

a SharedPreferences replacement for Android with multiprocess support

Telegram Bot API for Java

A web clone of the card game Cards Against Humanity.

Grimmory is the successor of booklore.

A library for displaying math formula in Android apps.

A third-party library of (very) useful additional objects for osmdroid

Hazelcast Code Samples

ksoap2-android - SOAP support for Android

A simple to use library to create Telegram Bots in Java