Freemium
Portainer
Open SourceContainers · DevOps
Self-hosted GUI for managing Docker and Kubernetes environments.
dockerkubernetesguiself-hosted
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Containers · DevOps
Self-hosted GUI for managing Docker and Kubernetes environments.
Penetration Testing · Security
Free, in-depth web security training with interactive labs, maintained by the Burp Suite team.
Ecosystem · CSS Tools
Tool for transforming CSS with JavaScript plugins.
Mobile Backend & Services · Mobile Development
Open-source product analytics, feature flags and session replay.
Programming Languages
Official PowerShell documentation from Microsoft.
Pipelines & ETL · Data & Analytics
Python workflow orchestration that feels like writing scripts — dynamic DAGs, retries, scheduling and a rich UI.
Ecosystem · CSS Tools
Open-source Tailwind component collection with rich interactive JS widgets and an extensive Figma kit.
Build & Lint · Frontend
Opinionated code formatter supporting many languages.
UI Libraries · Frontend
The Angular edition of the Prime suite: 90+ components with a standout data table.
UI Libraries · Frontend
The React edition of the Prime suite: 90+ components, theming presets and a powerful data table.
UI Libraries · Frontend
Rich Vue UI suite: 90+ components, themed presets and a massive data-table implementation.
ORMs · Backend
Type-safe ORM for TypeScript/Node with schema migrations and Studio.
Logs & Metrics · Monitoring & Observability
The standard open-source metrics collection and alerting toolkit.
Agent & LLM Frameworks · AI for Developers
The most comprehensive open guide to prompting techniques.
Agent & LLM Frameworks · AI for Developers
Open-source tool for testing and evaluating LLM prompts and models.
Other Formats · Data Formats
Official Protocol Buffers documentation from Google.
Infrastructure as Code · DevOps
Infrastructure as code in real programming languages.
E2E & Browser · Testing
Node.js library to control Chrome via the DevTools Protocol.
Unit & Component · Testing
The de-facto testing framework for Python: plain asserts, powerful fixtures and a rich plugin ecosystem.
Programming Languages
Official website and documentation for the Python programming language.
Vector Databases · AI for Developers
Open-source vector database written in Rust, with cloud offering.
UI Libraries · Frontend
Vue framework that targets SPA, PWA, SSR, mobile (Capacitor) and desktop (Electron) from one codebase.
Models & LLM APIs · AI for Developers
Alibaba's open-weight model family with multilingual strengths.
Frameworks · Frontend
Resumable framework with lazy execution for near-instant loads.