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Open source alternative to Auth0 / Firebase Auth / AWS Cognito

Generate diagrams from textual description

🔎 Open source distributed and RESTful search engine.

StarRocks, a Linux Foundation project, is a next-generation sub-second MPP OLAP database for full analytics scenarios, including multi-dimensional analytics, real-time analytics, and ad-hoc queries.

Apache Kafka® running on Kubernetes

A blazingly fast multi-language serialization framework powered by JIT and zero-copy.

Compiles Java bytecode to JavaScript, WebAssembly and C

Access other storage backends via the S3 API

ActiveJ is an alternative Java platform built from the ground up. ActiveJ redefines core, web and high-load programming in Java, providing simplicity, maximum performance and scalability

The Arend Proof Assistant

The Amazon Athena Query Federation SDK allows you to customize Amazon Athena with your own data sources and code.

🦎 A multi-protocol edge & service proxy. Seamlessly interface web apps, IoT clients, & microservices to Apache Kafka® via declaratively defined, stateless APIs.

S3 ninja emulates the Amazon S3 API for developement and test purposes

An implementation of the Random Cut Forest data structure for sketching streaming data, with support for anomaly detection, density estimation, imputation, and more.

Concurrent TreeMap w/ efficient support for clone() and consistent iteration

Tiny HTTP router library for Netty, that can route and create reverse routes

Yet another high performance REST server based on Netty & OpenAPI

[ABANDONED] Comparison of many HTTP servers raw hit performance

sql-logic-test

Resumable exceptions and delimited continuations for JVM

Java Least Squares fitting library.

Distributed, Scalable, Fault-Tolerant, Minimalistic Workflow Engine - No DAGs, No YAML, No Cumbersome Diagrams, Just Code