ashishps1 / awesome-system-design-resources

Learn System Design concepts and prepare for interviews using free resources.

opentrap / opentrap

A free, open-source alternative to Burp Suite: an intercepting proxy and web app security testing suite with Repeater, Intruder, Collaborator and a built-in OWASP ZAP scanner. Linux, AGPL-3.0.

dbeaver / dbeaver

Free universal database tool and SQL client

AstralAirAnchorage78 / Resp-Minecraft-AIO-Soft

Free/Best Software for Minecraft Yet

RadiusAxolotlChimney / Resp-Minecraft-AIO-Soft

Free/Best Software for Minecraft Yet

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.

0xProbabillity / luma-tv

A calm, tvOS-inspired home screen for Android TV and Google TV. No ads, no tracking.

doocs / advanced-java

😮 Core Interview Questions & Answers For Experienced Java(Backend) Developers | 互联网 Java 工程师进阶知识完全扫盲：涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识

kestra-io / kestra

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

opendataloader-project / opendataloader-pdf

PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.

OtterMind / Chat2DB

Chat2DB is a free, cross-platform, local-first database client and SQL workspace for developers, DBAs, analysts, and data teams. Connect to 40+ databases, manage data, edit and run SQL, and use your own AI model to generate, explain, and optimize queries. Available on desktop, web, Docker, and CLI, with MCP support.

apache / skywalking

APM, Application Performance Monitoring System

apache / shardingsphere

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

apache / doris

Apache Doris is a real-time analytics and hybrid search database for AI agents.

StarRocks / starrocks

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.

SonarSource / sonarqube

Continuous Inspection

AutoMQ / automq

Diskless Kafka® on S3. 10x Cost-Effective. No Cross-AZ Traffic Cost. Autoscale in seconds. Single-digit ms latency. Multi-AZ Availability.

apache / cassandra

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

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.

google / tsunami-security-scanner

Tsunami is a general purpose network security scanner with an extensible plugin system for detecting high severity vulnerabilities with high confidence.

MinecraftForge / MinecraftForge

Modifications to the Minecraft base files to assist in compatibility between mods. New Discord: https://discord.minecraftforge.net/

PowerJob / PowerJob

Enterprise job scheduling middleware with distributed computing ability.

dependency-check / DependencyCheck

OWASP dependency-check is a software composition analysis utility that detects publicly disclosed vulnerabilities in application dependencies.

apache / hertzbeat

An AI-powered next-generation open source real-time observability system.

jOOQ / jOOQ

jOOQ is the best way to write SQL in Java

hazelcast / hazelcast

Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

vavr-io / vavr

vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.

javaparser / javaparser

Java 1-25 Parser and Abstract Syntax Tree for Java with advanced analysis functionalities.

btraceio / btrace

Production-safe dynamic tracing and diagnostics for Java applications—attach to live JVMs with no restart or recompilation.

pmd / pmd

An extensible multilanguage static code analyzer.

runelite / runelite

Open source Old School RuneScape client

zfdang / Android-Touch-Helper

AdSkip — an Android assistant for automatically skipping app launch ads

micrometer-metrics / micrometer

An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

torakiki / pdfsam

PDFsam, a desktop application to split, merge, mix, rotate PDF files and extract pages

objectbox / objectbox-java

Database for Android and JVM - first and fast, lightweight on-device vector database

DependencyTrack / dependency-track

Dependency-Track is an intelligent Component Analysis platform that allows organizations to identify and reduce risk in the software supply chain.

uber / NullAway

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

MeteorDevelopment / meteor-client

Based Minecraft utility mod.

sofastack / sofa-rpc

SOFARPC is a high-performance, high-extensibility, production-level Java RPC framework.

dromara / liteflow

Lightweight, fast, stable, programmable component-based rule engine — where AI Agents orchestrate just like ordinary components. Uniquely designed DSL: component reuse, sync/async & dynamic orchestration, multi-language scripting, nested rules, hot deployment and smooth refresh. If you can orchestrate LiteFlow, you can orchestrate AI.

dtinit / data-transfer-project

The Data Transfer Project makes it easy for platforms to build interoperable user data portability features. We are establishing a common framework, including data models and protocols, to enable direct transfer of data both into and out of participating online service providers.

AxonIQ / AxonFramework

Framework for Evolutionary Message-Driven Microservices on the JVM

apache / linkis

Apache Linkis builds a computation middleware layer to facilitate connection, governance and orchestration between the upper applications and the underlying data engines.

internetarchive / heritrix3

Heritrix is the Internet Archive's open-source, extensible, web-scale, archival-quality web crawler project.

xerial / sqlite-jdbc

SQLite JDBC Driver

aeron-io / agrona

High Performance data structures and utility methods for Java

apache / hugegraph

A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)

manifold-systems / manifold

Manifold is a Java compiler plugin, its features include Metaprogramming, Properties, Extension Methods, Operator Overloading, Templates, a Preprocessor, and more.

vladmihalcea / hypersistence-utils

The Hypersistence Utils library (previously known as Hibernate Types) gives you Spring and Hibernate utilities that can help you get the most out of your data access layer.

mendhak / gpslogger

:satellite: Lightweight GPS Logging Application For Android.

PurpurMC / Purpur

Purpur is a drop-in replacement for Paper servers designed for configurability, and new fun and exciting gameplay features.

itext / itext-java

iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.

CaffeineMC / lithium

A Minecraft mod designed to improve the general performance of the game, without compromising functionality or mod compatibility

apache / atlas

Apache Atlas - Open Metadata Management and Governance capabilities across the Hadoop platform and beyond

JakeWharton / ProcessPhoenix

Process Phoenix facilitates restarting your application process.

jOOQ / jOOL

jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams. The JDK 8's main efforts (default methods, lambdas, and the Stream API) were focused around maintaining backwards compatibility and implementing a functional API for parallelism.

kaikramer / keystore-explorer

KeyStore Explorer is a free GUI replacement for the Java command-line utilities keytool and jarsigner.

zalando / logbook

An extensible Java library for HTTP request and response logging

sqlancer / sqlancer

Automated testing to find logic and performance bugs in database systems

google / adk-java

An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.