Ultra-fast SQL-like queries on Java collections
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a Business Process Management (BPM) Suite
- jbpm
- bpm
- bpmn
- business-process
Apache Solr open-source search software
- lucene
- solr
- search
- nosql
🦎 A lightweight, streaming-native, multi-protocol gateway for AI, APIs, and real-time data. Route LLM requests across providers, govern MCP tools, and connect Kafka, MQTT, and HTTP through one high-performance engine with shared security and observability.
Stream Processing and Complex Event Processing Engine
- streaming-data-processing
- cep
- stream-processing
- complex-event-processing
Real-Time Strategy game 3D engine coded in pure java
Hopsworks - Data-Intensive AI platform with a Feature Store
- feature-store
- aws
- azure
- data-science
轻量级DDD正向/逆向业务建模框架，支撑复杂业务系统的架构演化！
- ddd
- extension
- ddd-architecture
- clean-architecture
Secure and speedy templates for Java and Kotlin.
- java
- template-engine
- intellij
- kotlin
Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.
- java
- elasticsearch
- full-text-search
- lucene
🛡️ Protect your Minecraft server and lets players claim areas
- worldguard
- java
- minecraft
- worldedit
Java 8 optimized, memory efficient, speedy template engine producing statically typed, plain java objects
- java
- templating
- web
Charting library for Android applications. Automatically exported from code.google.com/p/achartengine
An easy open source Android Native Game FrameWork.
- android-game-framework
- engine
- jitpack
- 2d-game-engine
Classic point and click adventure game engine and editor
An Android demo of a foldable layout implementation. Engineered by Vincent Brison.
Multitenant backend server for building web and mobile apps rapidly. The backend for busy developers. (self-hosted or hosted)
- backend
- api-server
- json-api
- baas
A powerful, platform-independent, visual editor for complex 2D worlds and scenes.
- game-development
- 2d-game
- cross-platform
- java
JQuick Java: a lightweight Java-like scripting language for rule engines. Declare, parse and execute business rules at runtime via XML or inline scripts—no restart needed. Java 8+, embeddable, with LSP and IDEA plugin support.
Developed to power Conveyal's web-based interface for scenario planning and land-use/transport accessibility analysis, R5 is our routing engine for multimodal (transit/bike/walk/car) networks with a particular focus on public transit
LittleHorse Server: Business-as-Code Platform for Microservices, Workflows, and Agents
Java type safe statically compiled mustache
- annotation-processor
- java
- mustache
- template-engine
Reverse-engineer any Android TV / Google TV: 100% fail-safe direct boot launcher, remote hotkey remapping, Realtek hardware passthrough & offline media player.
🔧 Machines, ICs, PLCs, and more!
- java
- craftbook
- minecraft
- redstone