Free
Git Explorer
Open SourceCheatsheets & Learning · Git & Version Control
Find the right Git commands without searching through man pages.
gitcheatsheetcommand-generator
Browse the complete directory — use filters to narrow down.
Cheatsheets & Learning · Git & Version Control
Find the right Git commands without searching through man pages.
Hosting & Collaboration · Git & Version Control
Lightweight, self-hosted Git service written in Go.
Hosting & Collaboration · Git & Version Control
Dynamic GitHub profile cards — stats, top languages and streaks rendered as embeddable SVGs.
Cheatsheets & Learning · Git & Version Control
Generate useful .gitignore files for your stack.
Hosting & Collaboration · Git & Version Control
DevOps platform with Git hosting and built-in CI/CD; self-hostable.
Editors & IDEs · Development Environment
Cloud development environments that automate prebuilt workspaces.
Learning & Reference · CSS Tools
Learn CSS Grid by watering carrots in an interactive game.
Passwords & IDs · Security
Manage secrets, certificates and encryption centrally.
Agent & LLM Frameworks · AI for Developers
Open-source LLM observability — logging, caching, rate limiting and cost tracking behind a one-line proxy.
API Clients · API Tools
Lightweight, open-source API development ecosystem in the browser.
Headers & CSP · Security
Mozilla's scanner that grades a site's security headers and config.
API Mocking · API Tools
HTTP request and response service for testing clients.
Models & LLM APIs · AI for Developers
The AI community hub: models, datasets, spaces and libraries.
NoSQL · Database
Purpose-built time-series database for metrics and events.
APM & Tracing · Monitoring & Observability
Open-source distributed tracing platform, CNCF graduated.
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.
JSON · Data Formats
Open-source JSON visualizer that turns data into interactive graphs.
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.
Notebooks & Data Science · Data & Analytics
The standard interactive notebooks for data science and ML.
Web Servers & Proxies · DevOps
Popular open-source API gateway and microservices management.
Agent & LLM Frameworks · AI for Developers
Open-source LLM observability: traces, evals and prompt management.
Generators · CSS Tools
Interactive CSS Grid layout builder with code export.