Stars
The official home of the Presto distributed SQL query engine for big data
Apache Doris is an easy-to-use, high performance and unified analytics database.
Apache Beam is a unified programming model for Batch and Streaming data processing.
Pentaho Data Integration ( ETL ) a.k.a Kettle
OFD Reader & Writer 开源的OFD处理库，支持文档生成、数字签名、文档保护、文档合并、转换、导出等功能，文档格式遵循《GB/T 33190-2016 电子文件存储与交换格式版式文档》。
Scalable, reliable, distributed storage system optimized for data analytics and object store workloads.
LocationTech Spatial4j: A Geospatial Library for Java
Make Opensource Easy - tools for synchronizing repositories
Language bindings generated from the GTFS Realtime protocol buffer spec for popular languages.
Java port of the Proj.4 library for coordinate reprojection