Free
HyperUI
Open SourceEcosystem · CSS Tools
Free open-source Tailwind CSS components and blocks for marketing sites and e-commerce, copy-paste ready.
tailwindcomponentsecommerce
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Ecosystem · CSS Tools
Free open-source Tailwind CSS components and blocks for marketing sites and e-commerce, copy-paste ready.
Internationalization · Frontend
The de-facto JavaScript i18n framework — namespaces, plurals, interpolation and plugins for every framework.
Icons · Frontend
Icon explorer that searches dozens of icon sets instantly and copies as SVG, component or data-URI.
Icons · Frontend
Unified framework for using 200,000+ icons from many icon sets.
Regex
Collection of ready-made regex snippets with visual explanations.
Conversion · Image & Media
Batch tools to resize, compress, crop and convert images.
PDF Tools · PDF & Documents
Merge, split, compress, convert and sign PDFs online.
Conversion · Image & Media
Classic CLI suite for creating, editing and converting images.
Compression & Optimization · Image & Media
Free Mac app to optimize images without quality loss.
Image & Media
Turn a photo into a textured printable 3D STL model. Upload an image and get a 3D-printable mesh for makers, lithophanes and 3D printing - free tier available.
NoSQL · Database
Purpose-built time-series database for metrics and events.
Wallets & Infrastructure · Web3 & Blockchain
Consensys's hosted Ethereum and IPFS node service — scalable RPC access without running your own nodes.
Design Tools · Design & Prototyping
Free, open-source professional vector graphics editor.
API Clients · API Tools
Open-source API client for REST, GraphQL and gRPC by Kong.
Editors & IDEs · Development Environment
JetBrains IDE for JVM languages with deep code intelligence.
Cross-Platform · Mobile Development
Cross-platform SDK using web technologies for hybrid apps.
Orchestration · DevOps
The leading service mesh for traffic, security and observability.
Terminals & Shells · Development Environment
Feature-rich macOS terminal emulator with split panes and search.
APM & Tracing · Monitoring & Observability
Open-source distributed tracing platform, CNCF graduated.
Models & LLM APIs · AI for Developers
Open-source ChatGPT alternative that runs LLMs fully offline on your machine, with an OpenAI-compatible API.
Programming Languages
Official Java developer portal with documentation, tutorials and downloads.
Programming Languages
MDN reference and guides for JavaScript, maintained by Mozilla.
Minifiers · Developer Utilities
Free online JavaScript minifier with API access.
References · Documentation & Learning
The Modern JavaScript Tutorial — the deepest free JS reference from basics to advanced browser APIs.