Open Source Code Plagiarism Detection Tool. This is a tool for detecting source code similarity, supporting multiple programming languages such as Java, C/C++, Python, and JavaScript, which is suitable for identifying plagiarism in programming assignments and other scenarios.

Spring Framework for Developing AI Applications.This is an open-source Java framework initiated by the Spring team to simplify the development of applications that include AI capabilities. It easily integrates with mainstream model providers such as OpenAI, Microsoft, Amazon, Google, and Huggingface, and supports model types like chat, text-to-image generation. The framework offers functionalities such as prompt engineering, converting AI models to POJO objects, vector database integration, and RAG (Retrieval-Augmented Generation) to aid in the development of AI applications.

Java 的高性能缓存库。借鉴了 Guava 和 ConcurrentLinkedHashMap 的设计经验，青出于蓝而胜于蓝的 Java 本地缓存库，拥有更高的缓存命中率和更快的读写速度。

LoadingCache<Key, Graph> graphs = Caffeine.newBuilder()
    .maximumSize(10_000)
    .expireAfterWrite(Duration.ofMinutes(5))
    .refreshAfterWrite(Duration.ofMinutes(1))
    .build(key -> createExpensiveGraph(key));

Google 开源的 Java 三方类库。该库提供包括集合、I/O、缓存、并发等开箱即用的工具方法，任何的 Java 应用都可以通过依赖的方式引入该项目。作为 Google 的开源项目，本身的源码也是非常值得开发者学习

一个开源的 EL(T) 平台。能简单快速地把用户提供的应用、数据库等地方的数据聚合到平台，从而可以在一个平台查询、展示、更新、管理这些数据

基于 Java 开发的元数据治理平台，可接入 Hive、Kafka、ES、MySQL 等数据源。随着公司业务的发展，数据的复杂度会呈指数倍增长，通过文档和口口相传的方式管理数据关系的方式终将被淘汰。如果你体验过到处问数据库的字段含义、没捋清某个字段导致线上事故、分析数据毫无头绪等情况。这个时候就需要元数据治理平台，它提供浏览、搜索和管理每个字段的含义、关系、来源等信息，通过元数据的方式更好的治理和挖掘数据的价值。在线体验

一份算法清单，详细演示了 Java 中内置的算法实现。如果你想要知道平时使用 Java 时，Java 的内置算法如何帮你处理任务，那么这个项目值得一读。此外，这份清单中还用到了配图来帮助你理解

一个基于 Apache Ant 和 Maven 概念的项目自动化建构工具（干了这两个工具的活）。它使用一种基于 Groovy 的特定领域语言来声明项目设置，而不是传统的 XML（更灵活）。当前其支持的语言限于 Java、Groovy 和 Scala，计划未来将支持更多的语言

Efficient and Flexible Open Source Routing Engine. This project is a high-performance routing engine developed in Java, capable of quickly calculating the distance between two or more points. It supports algorithms such as Dijkstra, A*, and Contraction Hierarchies (CH), and can be used as a Java library or a web service. Based on OpenStreetMap map data, it can implement route planning and navigation services for various modes of transportation like car, bicycle, and pedestrian.

A Tool to 'Lock' Your Cloud Files. This is an open-source cloud storage file encryption tool that supports mainstream cloud storage services such as Dropbox and OneDrive. It is simple and user-friendly, cross-platform, and does not require registration. It uses AES-256 encryption to upload files and directories to the cloud storage, suitable for scenarios where data backup to the cloud is necessary but there are concerns about data leakage.