Open source. Open possibilities.

Directus wraps any SQL database with auto-generated REST and GraphQL APIs, a visual management Studio, and a native MCP server for AI agents. It supports granular permissions and self-hosting.

Countly Web SDK is a JavaScript analytics library for websites and web applications, enabling tracking of user behavior, events, profiles, crashes, A/B testing, performance monitoring, and feedback widgets, compatible with Countly Lite, Flex, and Enterprise platforms.

Reflex is a library for building full-stack web applications using pure Python, eliminating the need for JavaScript for frontend development.

C3.js is an MIT-licensed, D3-based reusable chart library that enables deeper integration of charts into web applications, with official docs, an examples gallery, a full API reference, and runnable samples.

deck.gl is a GPU-powered visualization framework designed for high-performance rendering of large-scale data sets using WebGL2 and WebGPU.

Sigma.js is an open-source JavaScript library designed for visualizing large-scale graphs containing thousands of nodes and edges using WebGL.

VectorBT is an open-source Python backtesting library that vectorizes strategy research: it packs thousands of parameter combinations into NumPy arrays and accelerates them with Numba and an optional Rust engine, plus portfolio analytics and interactive Plotly visualization.

A CLI tool for processing railway speed restriction data from spreadsheets and visualizing them on HTML maps.

Gradio is an open-source Python library for quickly building and sharing web applications for machine learning models, APIs, or any Python function without requiring web development experience.

39 editorial diagram types as self-contained HTML+SVG for AI coding assistants like Claude Code and Codex. Brand-matched, accessible, no build step. Import from draw.io, Mermaid, or Excalidraw.

D3 is a free, open-source JavaScript library for visualizing data. Built on web standards with a low-level approach, it renders dynamic, data-driven graphics using SVG, Canvas and HTML, and serves as a foundation for many higher-level chart libraries.

Plotly.js is a standalone JavaScript data visualization library used to create a wide variety of interactive charts and graphs.

marimo is a reactive Python notebook that ensures consistency between code and outputs, stored as pure Python files for git-friendliness and deployability.

A comprehensive curated collection of tools and recipes for Go projects, covering testing, dependencies, visualization, and static analysis.

Radzen Blazor is a free, MIT-licensed UI component library for Blazor with 145+ native C# components, including DataGrid, Scheduler, Charts, forms and layout controls, plus 10 built-in themes with light and dark variants.