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apache/
incubator-kie Apache KIE (Knowledge Is Everything) is the home of Drools, OptaPlanner, jBPM, and Kogito.
Java 6.3k stars
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JanssenProject/
jans The Janssen Project is a home for open source IAM components, featuring Auth Server (OAuth/OpenID), Agama low-code identity orchestration, and the Cedarling policy decision point. The "Janssen Server" distributions bundle IAM components under one control plane.
Java · Rust 652 stars
1 starter issuetaken
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4 first-timers merged
An issue to start with#15208 fix: fix(docs): autogenerate docs -autocreated (opens GitHub)1 open pull request
AthenZ/
athenz Open source platform for X.509 certificate based service authentication and fine grained access control in dynamic infrastructures. Athenz supports provisioning and configuration (centralized authorization) use cases as well as serving/runtime (decentralized authorization) use cases.
Java · JavaScript 1.0k stars
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jvondermarck/
dinosaur-exploder 🦖 Classic arcade shoot 'em up built with Java & FXGL. Contributions welcome – game & Next.js docs.
Java · TypeScript 110 stars
4 starter issues2 unclaimed
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80% mergedreport →replies in 23 hours
53 first-timers merged
An issue to start with#405 [Bug]: Cursor texture corrupted after loading Japanese font glyphs (opens GitHub)
checkstyle/
checkstyle Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.
Java 9.6k stars
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1 starter issueunclaimed
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82% mergedreport →replies in 2 hours
28 first-timers merged
An issue to start with#13030 Check if there are metrics that should be added to the Kafka dashboard. (opens GitHub)
eclipse-openj9/
openj9 Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.
Java · C++ 3.5k stars
1 starter issueunclaimed
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16 first-timers merged
An issue to start with#24803 Replace `scanMonitorLookupCaches()` loop with memset (opens GitHub)
apache/
fory A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.
Java · Python 4.6k stars
2 starter issuesall taken
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15 first-timers merged
An issue to start with#2941 [Java] support copy non-serializable objects such as java.lang.Package (opens GitHub)1 open pull request
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debezium/
debezium Change data capture for a variety of databases. Please log issues at https://github.com/debezium/dbz/issues.
Java 13k stars
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21 first-timers merged
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microcks/
microcks The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
Java · TypeScript 2.1k stars
2 starter issues1 unclaimed
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69% mergedreport →replies in 2 days
19 first-timers merged
An issue to start with#2116 test: migrate webapp ITs from TestRestTemplate to RestTestClient (opens GitHub)
2 starter issuesall unclaimed
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15 first-timers merged
An issue to start with#2170 [release] JRELEASER_DEFAULT_GIT_REMOTE ignored during tagging v2 (opens GitHub)
alibaba/
nacos an easy-to-use dynamic service discovery, configuration and service management platform for building AI cloud native applications.
Java 33k stars
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18 first-timers merged
An issue to start with#15846 nacos.io网站里有文字书写错误 (opens GitHub)
FasterXML/
jackson-databind General data-binding package for Jackson: works on streaming API (core) implementation(s)
Java 3.8k stars
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line/
armeria 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, Retrofit, Reactive Streams, Spring Boot and Dropwizard.
Java 5.1k stars
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13 first-timers merged
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FasterXML/
jackson-core Core part of Jackson that defines Streaming API as well as basic shared abstractions
Java 2.4k stars
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1 starter issueunclaimed
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65% mergedreport →replies in 17 hours
15 first-timers merged
An issue to start with#2717 typo in gltf loader aspectRation -> aspectRatio (opens GitHub)
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7 first-timers merged
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kestra-io/
kestra Event Driven Orchestration & Scheduling Platform for Mission Critical Applications
Java · TypeScript 29k stars
5 starter issuesall unclaimed
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79% mergedreport →replies in 2 days
9 first-timers merged
An issue to start with#20063 Unit tests: replace explicit `any` with real types in Editor language services (opens GitHub)
junit-team/
junit-framework ✅ The programmer-friendly testing framework for Java and the JVM
Java 7.1k stars
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apache/
shardingsphere Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.
Java 21k stars
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Discord4J/
Discord4J Discord4J is a fast, powerful, unopinionated, reactive library to enable quick and easy development of Discord bots for Java, Kotlin, and other JVM languages using the official Discord Bot API.
Java 1.9k stars
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