Freemium
Web3 Libraries · Web3 & Blockchain
Full web3 development kit — SDKs, contract deployment, wallets and built-in infrastructure for shipping dApps fast.
web3sdksmart-contracts
Browse the complete directory — use filters to narrow down.
Web3 Libraries · Web3 & Blockchain
Full web3 development kit — SDKs, contract deployment, wallets and built-in infrastructure for shipping dApps fast.
Relational · Database
PostgreSQL extension and cloud for time-series and analytics.
Compression & Optimization · Image & Media
Smart lossy compression for PNG and JPEG images.
Whiteboards & Diagrams · Design & Prototyping
Beautiful open-source infinite canvas SDK and whiteboard.
Models & LLM APIs · AI for Developers
Cloud for open-source model inference, fine-tuning and hosting.
Web Servers & Proxies · DevOps
Cloud-native reverse proxy and ingress controller with auto discovery.
Secret Scanning · Security
Open-source tool to find, verify and monitor leaked credentials.
Penetration Testing · Security
Guided, browser-based cybersecurity training with hands-on labs from beginner to offensive paths.
Serverless & BaaS · Database
Distributed SQLite-based database for edge and local-first apps.
Search Engines · Database
Open-source, in-memory search engine focused on developer experience.
Typography & Fonts · Design & Prototyping
Curated font recommendations and pairing guides with real-website examples for every family.
Documentation Generators · PDF & Documents
Modern, fast typesetting system — a fresh alternative to LaTeX.
Game Engines · Game Development
The most widely used game engine for mobile, AR/VR and indie titles, with a massive asset ecosystem.
Feature Flags · DevOps
Open-source feature flag platform you can self-host — strategies, gradual rollouts and an activation dashboard.
Game Engines · Game Development
AAA-grade game engine known for high-fidelity 3D graphics, Blueprints visual scripting and C++ workflows.
Stock & Placeholders · Image & Media
High-quality free stock photos with a developer API.
Design Tools · Design & Prototyping
The largest Figma UI kit and React library — 10k+ components and variants in a clean, modern style.
Uptime & Alerting · Monitoring & Observability
Popular hosted uptime monitoring with 50 free monitors.
AI Coding Assistants · AI for Developers
Vercel's generative UI builder for React and shadcn/ui components.
PaaS & Edge · Cloud Platforms
Frontend cloud optimized for Next.js with edge functions and previews.
Reference & Standards · Security
Scan files, URLs and domains with 70+ antivirus engines.
Editors & IDEs · Development Environment
Microsoft's full IDE for .NET, C++ and Windows development.
VPS & Bare Metal · Cloud Platforms
Global cloud with simple compute, storage and Kubernetes offerings.
Terminals & Shells · Development Environment
AI-powered terminal with blocks, workflows and agent mode.