Free
RabbitMQ
Open SourceQueues & Streaming · Database
Reliable, widely-deployed message broker with AMQP.
messagingamqpqueues
Browse the complete directory — use filters to narrow down.
Queues & Streaming · Database
Reliable, widely-deployed message broker with AMQP.
PaaS & Edge · Cloud Platforms
Deploy services and databases quickly with sensible defaults.
Documentation Generators · PDF & Documents
Hosted documentation platform for Sphinx and MkDocs projects.
Smart Contracts · Web3 & Blockchain
Browser IDE for Solidity — write, compile, deploy and debug contracts with zero local setup.
PaaS & Edge · Cloud Platforms
Unified cloud to build and run apps, sites and databases.
AI Coding Assistants · AI for Developers
Cloud IDE with AI agents for building and deploying apps quickly.
Email · API Tools
Developer-first email API with React Email templates.
Payments · API Tools
Subscription infrastructure for mobile apps — cross-platform in-app purchases, entitlements and analytics.
Error Tracking · Monitoring & Observability
Real-time error tracking and debugging for many platforms.
Headless CMS · Backend
Composable headless CMS with a real-time editing studio.
Cheatsheets & Learning · Git & Version Control
The SemVer specification for meaningful version numbers.
Dependency Security · Security
Fast static analysis for finding bugs and vulnerabilities in code.
Hosting & Collaboration · Git & Version Control
The badge service for READMEs — build status, version, downloads and custom badges as compact SVGs.
APM & Tracing · Monitoring & Observability
Open-source Datadog alternative built on OpenTelemetry.
Stock & Placeholders · Image & Media
The largest platform to publish, share and download 3D models with an embeddable WebGL viewer.
Dependency Security · Security
Find and fix vulnerabilities in dependencies, containers and code.
AI Coding Assistants · AI for Developers
Code search and intelligence platform; makers of Cody AI.
Relational · Database
Self-contained, serverless, embedded SQL database engine.
PDF Tools · PDF & Documents
Self-hosted PDF toolbox with 50+ operations, locally run.
API Documentation · API Tools
Design-first API platform for specs, docs, mocking and governance.
Payments · API Tools
The standard payments platform with excellent developer APIs.
NoSQL · Database
Multi-model database with records, graphs and documents (trending).
API Documentation · API Tools
OpenAPI tooling suite by SmartBear: UI, editor, codegen and more.
Practice & Challenges · Documentation & Learning
Free, curated interview prep: algorithms study plans, behavioral questions and resume advice by ex-Facebook engineers.