Ghidra is a software reverse engineering (SRE) framework

Everything you need to know to get the job.

Learn System Design concepts and prepare for interviews using free resources.

Open Source Identity and Access Management For Modern Applications and Services

Telegram for Android source

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

Apache Flink

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

APM, Application Performance Monitoring System

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

A fast dependency injector for Android and Java.

Apache Pulsar - distributed pub-sub messaging system

The ZAP by Checkmarx Core project

🏗 Build container images for your Java applications.

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

🔎 Open source distributed and RESTful search engine.

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

A configuration as code language with rich validation and tooling.

Spinnaker is an open source, multi-cloud continuous delivery platform for releasing software changes with high velocity and confidence.

Apache Iceberg

Apache Beam is a unified programming model for Batch and Streaming data processing.

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

Open source version of Google Authenticator (except the Android app)

Yahoo! Cloud Serving Benchmark

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, R…

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.