A collective list of free APIs

Pre-indexed code knowledge graph, auto syncs on code changes, for Claude Code, Codex, Gemini, Cursor, OpenCode, AntiGravity, Kiro, and Hermes Agent — fewer tokens, fewer tool calls, 100% local

A collection of projects designed to help developers quickly get started with building deployable applications using the Claude API

Essential principles for frontend development

Spring Data Commons. Interfaces and code shared between the various datastore specific implementations.

Spring Batch is a framework for writing batch applications using Java and Spring

Public repository for Agent Skills

Spring Data Relational. Home of Spring Data JDBC and Spring Data R2DBC.

A modern Git library built for Node.js with blazing-fast installation and rock-solid stability, powered by N-API.

📊 Re-usable, easy interface JavaScript chart library based on D3.js, with SVG and Canvas rendering support

Spring Session

Spring Security

Provides support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data acc…

Provides support to increase developer productivity in Java when using Redis, a key-value store. Uses familiar Spring concepts such as a template classes for core API usage and lightweight reposito…

An Application Framework for AI Engineering

A collection of notebooks/recipes showcasing some fun and effective ways of using Claude.

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

APM, (Application Performance Management) tool for large-scale distributed systems.

Apache Kafka - A distributed event streaming platform

Enterprise-grade React Native framework for microservice apps. Brownfield friendly, 200KB bundles, AWS-ready infrastructure.

Spring Framework

Let Fixture Monkey generates fully-customizable, randomly populated instance. Focus on the properties of the class that really matter in your test.

All-in-one for React Suspense — ErrorBoundary with shouldCatch, clientOnly to skip SSR for a boundary, Delay, and more

Hexagonal hierarchical geospatial indexing system

A TypeScript-first documentation generator from JSDoc comments

Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

ARCUS Java client

One database for user-user (follows), user-item (likes), and item-item (related items) interactions — precomputed at write time, served as simple lookups

A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash.

Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflo…