Repository Index

Free and Open Source, Distributed, RESTful Search Engine

• elasticsearch
• java
• search-engine

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

• awesome
• backend
• computer-science
• distributed-systems

Open Source Identity and Access Management For Modern Applications and Services

• keycloak
• oidc
• saml

Telegram for Android source

• telegram

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

• json
• markdown
• pdf
• ai

Orchestrate everything, everywhere. The open-source control plane for workflows across data, infrastructure, business processes and AI agents. Declarative YAML, event-driven, any language, Git-versioned, scalable to millions of executions.

• orchestration
• data-orchestration
• high-availability
• infrastructure-as-code

Learn Low Level Design (LLD) and prepare for interviews using free resources.

• awesome
• design-patterns
• interview
• interview-practice

:fire: Seata is an easy-to-use, high-performance, open source distributed transaction solution.

• tcc
• saga
• xa
• at

Translated🔥 An open-source BI tool anyone can use, a powerful data visualization tool. An open-source BI tool alternative to Tableau.

• tableau
• data-visualization
• superset
• apache-doris

Translated😱 From the source code level, analyze and dig into the underlying implementation principles of mainstream technologies in the internet industry, making it convenient for developers to "improve their technical depth". Currently covers the Spring family of frameworks, the Mybatis, Netty, and Dubbo frameworks, and middleware such as Redis and Tomcat

• sourcecode-analysis
• spring
• mybatis
• netty

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

• java
• aot
• compiler
• graalvm

Awesome LeetCode resources to learn Data Structures and Algorithms and prepare for Coding Interviews.

• algorithms
• coding
• data-structures
• leetcode

Tinker is a hot-fix solution library for Android, it supports dex, library and resources update without reinstall apk.

• android
• dynamic
• hotfix
• wechat

QuestDB is a high performance, open-source, time-series database

• time-series
• low-latency
• database
• sql

The ZAP by Checkmarx Core project

• zap
• zap-development
• dast
• appsec

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

• authentication
• session-management
• login
• supertokens

Translated💪 A framework for assisting in the renovation of Android componentization

• android
• router
• navigation
• componentization

🔎 Open source distributed and RESTful search engine.

• search
• search-engine
• analytics
• java

TranslatedReading the Spring source code

• spring
• notes
• source-code-analysis

A free, secure and open source app for Android to manage your 2-step verification tokens.

• otp
• totp
• hotp
• android

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.

• huggingface
• java
• langchain
• openai

Open-Source Web UI for Apache Kafka Management

• kafka-ui
• kafka-brokers
• kafka
• kafka-streams

OpenRefine is a free, open source power tool for working with messy data and improving it

• datacleansing
• data-analysis
• java
• opendata

TranslatedAn open-source, end-to-end, product-grade general-purpose agent