Free
Istio
Open SourceOrchestration · DevOps
The leading service mesh for traffic, security and observability.
service-meshkubernetesnetworking
Browse the complete directory — use filters to narrow down.
Orchestration · DevOps
The leading service mesh for traffic, security and observability.
APM & Tracing · Monitoring & Observability
Open-source distributed tracing platform, CNCF graduated.
Models & LLM APIs · AI for Developers
Open-source ChatGPT alternative that runs LLMs fully offline on your machine, with an OpenAI-compatible API.
References · Documentation & Learning
The Modern JavaScript Tutorial — the deepest free JS reference from basics to advanced browser APIs.
CI/CD · DevOps
The classic open-source automation server for CI/CD.
Unit & Component · Testing
Delightful JavaScript testing framework with snapshots and mocks.
CLI Tools · Development Environment
Lightweight command-line JSON processor.
Programming Languages
High-performance language for technical and scientific computing.
Unit & Component · Testing
The standard testing framework for the JVM: annotation-driven unit tests for Java and Kotlin.
Notebooks & Data Science · Data & Analytics
The standard interactive notebooks for data science and ML.
CLI Tools · Development Environment
Handy, syntax-clean command runner for project-specific recipes.
Load & Performance · Testing
Open-source load testing tool using JavaScript test scripts.
Orchestration · DevOps
Terminal UI to interact with and manage Kubernetes clusters.
Penetration Testing · Security
Debian-based Linux distribution shipping 600+ preinstalled penetration testing and forensics tools.
Screenshots · Image & Media
Beautiful open-source screen recorder for macOS — captures, trims and exports GIFs/MP4s with plugins.
Authentication · API Tools
Open-source identity and access management with SSO and SAML.
Web Servers & Proxies · DevOps
Popular open-source API gateway and microservices management.
Programming Languages
Official Kotlin language site: docs, playground and standard library reference.
Cross-Platform · Mobile Development
Share Kotlin code across iOS, Android, desktop and web.
Orchestration · DevOps
Template-free customization of Kubernetes YAML manifests.
ORMs · Backend
Type-safe SQL query builder for TypeScript, no DSL required.
Agent & LLM Frameworks · AI for Developers
Framework for building LLM applications with agents and chains.
Agent & LLM Frameworks · AI for Developers
Open-source LLM observability: traces, evals and prompt management.
Agent & LLM Frameworks · AI for Developers
Build stateful, multi-agent AI applications as graphs.