龙果支付系统（roncoo-pay）是国内首款开源的互联网支付系统，拥有独立的账户体系、用户体系、支付接入体系、支付交易体系、对账清结算体系。目标是打造一款集成主流支付方式且轻量易用的支付收款系统，满足互联网业务系统打通支付通道实现支付收款和业务资金管理等功能。

SSDB - A fast NoSQL database, an alternative to Redis

The java implementation of Apache Dubbo. An RPC and microservice framework.

Asynchronous Http and WebSocket Client library for Java

Schedules recurring data imports from various sources into Apache Solr (moved from GoogleCode)

敏感词过滤、广告词过滤、包含敏感词库，停顿词库。

Open source library for content based image retrieval / visual information retrieval.