Freemium
InfluxDB
Open SourceNoSQL · Database
Purpose-built time-series database for metrics and events.
time-seriesmetricsiot
Browse the complete directory — use filters to narrow down.
NoSQL · Database
Purpose-built time-series database for metrics and events.
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.
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.
CI/CD · DevOps
The classic open-source automation server for CI/CD.
Unit & Component · Testing
Delightful JavaScript testing framework with snapshots and mocks.
State & Forms · Frontend
Primitive and flexible atomic state management for React.
CLI Tools · Development Environment
Lightweight command-line JSON processor.
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
Format, validate, minify and view JSON online.
JSON · Data Formats
Beautiful, shareable JSON viewer with previews for many data types.
JSON · Data Formats
Official site of the JSON Schema specification, with tools and validators.
Mocks & Fakes · Testing
Get a full fake REST API from a JSON file in seconds.
JSON · Data Formats
The classic JSON validator and formatter.
API Mocking · API Tools
Free fake REST API for prototyping and testing.