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支持并发的实时排行、排名、排行榜、排序工具（Support for concurrent real-time ranking\sorting tools）-java
Scalable datastore for metrics, events, and real-time analytics
A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）
Software Transactional Memory Implementation for the JVM
Thumbnailator - a thumbnail generation library for Java
brpc is an Industrial-grade RPC framework using C++ Language, which is often used in high performance system such as Search, Storage, Machine learning, Advertisement, Recommendation etc. "brpc" mea…
An annotation processor for generating type-safe bean mappers
Demonstrate all the questions on LeetCode in the form of animation.（用动画的形式呈现解LeetCode题目的思路）
An easy to use and powerful chaos engineering experiment toolkit.（阿里巴巴开源的一款简单易用、功能强大的混沌实验注入工具）
Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.
A Java server-side recording and playback solution based on JVM-Sandbox
APM, Application Performance Monitoring System
APM, (Application Performance Management) tool for large-scale distributed systems.
Grammars written for ANTLR v4; expectation that the grammars are free of actions.
Apache DolphinScheduler is the modern data orchestration platform. Agile to create high performance workflow with low-code
MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。
OCTO-NS是美团OCTO服务治理体系服务注册发现功能的套件, 包括SDK(Java/C++)、本地服务治理代理(SgAgent), 服务缓存(NSC), 云端健康检查(Scanner)等基础组件，目前已经在全公司大规模使用
An application observability facade for the most popular observability tools. Think SLF4J, but for observability.
Sampling CPU and HEAP profiler for Java featuring AsyncGetCallTrace + perf_events
A library that provides an embeddable, persistent key-value store for fast storage.
Fault tolerance and resilience patterns for the JVM