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.
Models & LLM APIs · AI for Developers
Cloud for open-source model inference, fine-tuning and hosting.
Other Formats · Data Formats
Official TOML language site with spec, docs and editor support.
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.
Web Analytics · Monitoring & Observability
Simple, self-hostable web analytics you own (trending).
Feature Flags · DevOps
Open-source feature flag platform you can self-host — strategies, gradual rollouts and an activation dashboard.
Stock & Placeholders · Image & Media
High-quality free stock photos with a developer API.
Uptime & Alerting · Monitoring & Observability
Fancy open-source self-hosted uptime monitoring with status pages.
Uptime & Alerting · Monitoring & Observability
Popular hosted uptime monitoring with 50 free monitors.
NoSQL · Database
Community-driven Redis fork under the Linux Foundation (trending).
PaaS & Edge · Cloud Platforms
Frontend cloud optimized for Next.js with edge functions and previews.
Full-stack Boilerplates · Project Starters
Official and community starter templates for Next.js, AI apps, commerce and more — one-click deploy to Vercel.
Reference & Standards · Security
Scan files, URLs and domains with 70+ antivirus engines.
VPS & Bare Metal · Cloud Platforms
Global cloud with simple compute, storage and Kubernetes offerings.
Vector Databases · AI for Developers
Open-source vector database with hybrid search and modules.
Agent & LLM Frameworks · AI for Developers
Experiment tracking, model monitoring and ML evaluation platform.
API Mocking · API Tools
Flexible API mocking and service virtualization for HTTP.
Simulators · IoT & Embedded
Simulate Arduino, ESP32, Raspberry Pi Pico and more in the browser — no hardware needed to test circuits and code.
Payments · API Tools
Payment gateway for Indonesia and Southeast Asia markets.