Lucas0623z / NoteLite
Open-source OMR and guided music practice: turn sheet music PDFs/images into MusicXML/MIDI, refine scores, and practice with MIDI or microphone feedback.
Lucas0623z / NoteLite
keycloak / keycloak
Open Source Identity and Access Management For Modern Applications and Services
opendataloader-project / opendataloader-pdf
PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.
libgdx / libgdx
Desktop/Android/HTML5/iOS Java game development framework
plantuml / plantuml
Generate diagrams from textual description
langchain4j / langchain4j
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
apple / pkl
A configuration as code language with rich validation and tooling.
jhy / jsoup
jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
apereo / cas
Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
wiremock / wiremock
A tool for mocking HTTP services
rest-assured / rest-assured
Java DSL for easy testing of REST services
Angel-ML / angel
A Flexible and Powerful Parameter Server for large-scale machine learning
apache / camel
Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.
JanusGraph / janusgraph
JanusGraph: an open-source, distributed graph database
deepjavalibrary / djl
An Engine-Agnostic Deep Learning Framework in Java
LibrePDF / OpenPDF
OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDF documents, as well as generating PDFs from HTML. It is licensed under the LGPL and MPL.
knowm / XChange
XChange is a Java library providing a streamlined API for interacting with 60+ Bitcoin and Altcoin exchanges providing a consistent interface for trading and accessing market data.
Netflix / maestro
Maestro: Netflix’s Workflow Orchestrator
FasterXML / jackson-databind
General data-binding package for Jackson: works on streaming API (core) implementation(s)
apache / hugegraph
A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)
CodeRayZhang / Movie_Recommend
历史学习项目：Spark 电影推荐、爬虫、Web 与后台。新版持续开发见 cinematch-recommender。
thymeleaf / thymeleaf
Thymeleaf is a modern server-side Java template engine for both web and standalone environments.
apache / casbin-jcasbin
An authorization library that supports access control models like ACL, RBAC, ABAC in Java
pac4j / pac4j
Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...
FasterXML / jackson-core
Core part of Jackson that defines Streaming API as well as basic shared abstractions
apache / poi
Mirror of Apache POI gitbox. The Java API for Microsoft Documents.
flyingsaucerproject / flyingsaucer
XML/XHTML and CSS 2.1 renderer in pure Java
plantuml / plantuml-server
PlantUML Online Server
apache / tinkerpop
Apache TinkerPop - a graph computing framework
langgraph4j / langgraph4j
🚀 LangGraph for Java is a library for Graph Engineering, designed to build sophisticated AI agentic architectures within the Java ecosystem. It works seamlessly with both Langchain4j and Spring AI.
validator / validator
The Nu Html Checker (vnu)
dromara / MaxKey
Dromara MaxKey 🗝️ SSO ,Leading-Edge IAM-IDaas(Identity and Access Management) Product , Under Apache-2.0 is free ，业界领先的IAM-IDaas身份管理和认证产品，遵循Apache-2.0开源免费，支持OAuth2.x、OpenID Connect、SAML2.0、CAS、JWT、SCIM等SSO标准协议，基于RBAC统一权限控制，实现用户生命周期管理，开源、安全、合规、自主可控。
GoogleCloudPlatform / java-docs-samples
Java and Kotlin Code samples used on cloud.google.com
stacksimplify / aws-eks-kubernetes-masterclass
AWS EKS Kubernetes - Masterclass | DevOps, Microservices
webhtv / webhtv
WebHomeTV 基于FongMi二次开发，增强了 WebHome 自定义首页、App Native SDK、网盘链接检测 和 Nostr推荐首页。 这个项目的核心目标是让 CSP 站点首页可以变成一个真正可开发的网页应用：开发者可以用 HTML/CSS/JavaScript 定制首页，再通过 App 暴露的 Native 能力完成搜索、播放、跨域请求、资源代理、最近观看、网盘检测和状态同步。
mit-cml / appinventor-sources
MIT App Inventor Public Open Source
bamlab / react-native-image-resizer
🗻 Resize local images with React Native
nroduit / Weasis
Weasis is a web-based DICOM viewer for advanced medical imaging and seamless PACS integration.
Jaspersoft / jasperreports
JasperReports® - Free Java Reporting Library
spiculedata / saiku
Open-source semantic layer: one cube for Excel (MDX/XMLA), dashboards, and AI agents (MCP). Mondrian + Apache Calcite.
zinggAI / zingg
Scalable master data management, identity resolution, entity resolution, and deduplication using ML
sirixdb / sirix
SirixDB is an an embeddable, bitemporal, append-only database system and event store, storing immutable lightweight snapshots. It keeps the full history of each resource. Every commit stores a space-efficient snapshot through structural sharing. It is log-structured and never overwrites data. SirixDB uses a novel page-level versioning approach.
ArcadeData / arcadedb
ArcadeDB Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.
casid / jte
Secure and speedy templates for Java and Kotlin.
apache / ofbiz-framework
Apache OFBiz is an open source product for the automation of enterprise processes. It includes framework components and business applications for ERP, CRM, E-Business/E-Commerce, Supply Chain Management and Manufacturing Resource Planning. OFBiz provides a foundation and starting point for reliable, secure and scalable enterprise solutions.
apache / systemds
An open source ML system for the end-to-end data science lifecycle
networknt / json-schema-validator
A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12
FasterXML / jackson-annotations
Core annotations (annotations that only depend on jackson-core) for Jackson data processor
authorjapps / zerocode
zerocode-tdd is a community-developed, free, open-source, outcome-driven automated testing framework for Data Pipelines, ETL, REST API, Kafka(Data Streams), Databases and Load scenarios. all defined in simple JSON or YAML — with zero coding.
ontop / ontop
Ontop is a platform to query relational databases as Virtual RDF Knowledge Graphs using SPARQL
vaadin / hilla
Build better business applications, faster. No more juggling REST endpoints or deciphering GraphQL queries. Hilla seamlessly connects Spring Boot and React to accelerate application development.
OWASP / java-html-sanitizer
Takes third-party HTML and produces HTML that is safe to embed in your web application. Fast and easy to configure.
apache / cxf
Apache CXF
lucee / Lucee
Lucee is a high-performance, open-source CFML server written in Java. Supporting JDBC, Caching, Parallelism, HTTP, ORM, REST, S3 and dynamic Java integration, Lucee is great for developers aiming to build fast, scalable applications, delivering faster startup, rapid compilation and better runtime performance.
jpmml / jpmml-evaluator
Java Evaluator API for PMML
OpenIdentityPlatform / OpenAM
OpenAM is an open-source access management solution for identity authentication, authorization, and federation. It provides single sign-on, adaptive authentication, and centralized policy control, enabling secure access to web, mobile, and cloud applications
wso2 / product-is
Welcome to the WSO2 Identity Server source code! For info on working with the WSO2 Identity Server repository and contributing code, click the link below.
yegor256 / takes
True Object-Oriented Java Web Framework without NULLs, Static Methods, Annotations, and Mutable Objects
JOML-CI / JOML
A Java math library for OpenGL rendering calculations
apache / wicket
Apache Wicket - Component-based Java web framework