a fast, scalable, multi-language and extensible build system

The official home of the Presto distributed SQL query engine for big data

Alluxio, data orchestration for analytics and machine learning in the cloud

Generates a unified GraphQL schema from gRPC microservices and other Protobuf sources

AI constraint solver in Java to optimize the vehicle routing problem, employee rostering, task assignment, maintenance scheduling, conference scheduling and other planning problems.

Mass Service Engine in Cluster(MSEC) is opened source by QQ team from Tencent. It is a backend DEV &OPS engine, including RPC,name finding,load balance,monitoring,release and capacity management.

A system for distributing and managing secrets

Copybara: A tool for transforming and moving code between repositories.

Secor is a service implementing Kafka log persistence

Open-source XMPP client for Android

Etherpad Open-Source Repository

The Heroic Time Series Database

A distributed system designed to ingest and process time series data

yaxim - a lean XMPP/Jabber client for Android