#Java

uber

NullAway

★ 4,104

A tool to help eliminate NullPointerExceptions (NPEs) in your Java code with low build-time overhead.

apache

tika

★ 4,062

The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF).

openrewrite

rewrite

★ 3,710

Automated mass refactoring of source code. It consists of an auto-refactoring engine that runs prepackaged, open source refactoring recipes for common framework migrations, security fixes, and stylistic consistency tasks-reducing your coding effort from hours or days to minutes.

apache

cloudstack

★ 3,058

Apache CloudStack is an opensource Infrastructure as a Service (IaaS) cloud computing platform.

opensolon

solon

★ 2,777

Java enterprise application development framework for full scenario: Restrained, Efficient, Open, Ecologicalll!!! 700% higher concurrency 50% memory savings Startup is 10 times faster. Packing 90% smaller; Compatible with java8 ~ java25; Supports LTS. (Replaceable spring).

open-telemetry

opentelemetry-java-instrumentation

★ 2,625

OpenTelemetry auto-instrumentation and instrumentation libraries for Java.

pac4j

pac4j

★ 2,524

Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...

apache

sedona

★ 2,408

A cluster computing framework for processing large-scale geospatial data.

magefree

mage

★ 2,357

XMage - Magic Another Game Engine. XMage, Magic, Another Game Engine XMage allows you to play Magic against one or more online players or computer opponents.

gaul

s3proxy

★ 2,336

Access other storage backends via the S3 API. Developers can build the project by running mvn package which produces a binary at target/s3proxy.

apache

fluss

★ 2,147

Apache Fluss is a streaming storage built for real-time analytics.

apache

polaris

★ 2,056

Apache Polaris is an interoperable metadata catalog for Apache Iceberg tables designed for cross-engine compatibility.

murraco

spring-boot-jwt

★ 1,687

JWT auth service using Spring Boot, Spring Security and MySQL

java-diff-utils

java-diff-utils

★ 1,546

Diff Utils library is an OpenSource library for performing the comparison / diff operations between texts or some kind of data: computing diffs, applying patches, generating unified diffs or parsing them, generating diff output for easy future displaying (like side-by-side view) and so on.

objectionary

eo

★ 1,456

EOLANG, an Experimental Pure Object-Oriented Programming Language Based on 𝜑-Calculus

spiculedata

saiku

★ 1,322

Open-source semantic layer: one cube for Excel (MDX/XMLA), dashboards, and AI agents (MCP). Mondrian + Apache Calcite.

soulfiremc-com

SoulFire

★ 616

Advanced Minecraft Bot Tool. Deploy automated bots for server testing, automation, and development.