Free
Jenkins
Open SourceCI/CD · DevOps
The classic open-source automation server for CI/CD.
ci-cdautomationself-hosted
Browse the complete directory — use filters to narrow down.
CI/CD · DevOps
The classic open-source automation server for CI/CD.
Unit & Component · Testing
Delightful JavaScript testing framework with snapshots and mocks.
State & Forms · Frontend
Primitive and flexible atomic state management for React.
CLI Tools · Development Environment
Lightweight command-line JSON processor.
JSON · Data Formats
Advanced JSON editor with tree view, query, transform and diff.
JSON · Data Formats
Beautiful, shareable JSON viewer with previews for many data types.
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.
Orchestration · DevOps
Terminal UI to interact with and manage Kubernetes clusters.
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.
Terminals & Shells · Development Environment
Fast, GPU-based terminal with graphics support and layouts.
Programming Languages
Official Kotlin language site: docs, playground and standard library reference.
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
Build stateful, multi-agent AI applications as graphs.
Generators · CSS Tools
Interactive CSS Grid layout builder with code export.
Cheatsheets & Learning · Git & Version Control
Interactive visualization game for learning Git branching.
SSL & TLS · Security
Diagnose why Let's Encrypt certificate issuance fails for a domain.
Load & Performance · Testing
Google's automated audits for performance, SEO, a11y and best practices.
Internationalization · Frontend
Developer-friendly i18n for React and Node — readable message catalogs, macros and automatic extraction.
Models & LLM APIs · AI for Developers
Open-source LLM gateway: one API for 100+ providers.
Models & LLM APIs · AI for Developers
The C/C++ inference engine that runs LLMs everywhere, even laptops.