Top CHART GitHub Repositories & Tools (2026)

React Flow | Svelte Flow - Powerful open source libraries for building node-based UIs with React (https://reactflow.dev) or Svelte (https://svelteflow.dev). Ready out-of-the-box and infinitely customizable.

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

Open Source Algo Trading Platform for Everyone

Lightweight cross-platform RF circuit + electromagnetic simulator. DC, S-parameters, harmonic balance, loadpull. Also supports 2D and 3D layout and design and electromagnetic MoM, FEM, FDTD + thermal FEM.

A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

Production-grade charts built for brokers, exchanges, trading platforms, and financial portals. Bring your own market data, plug it in, and deliver a complete charting experience without building the charting stack from scratch. Open source. Data-agnostic. Ready to integrate.

Operator to streamline renovate executions in Kubernetes

Element Server Suite Community Edition

Go language library for reading and writing Microsoft Excel™ (XLAM / XLSM / XLSX / XLTM / XLTX) spreadsheets

📊 The concise and progressive visualization grammar.

Fast macOS disk-usage analyzer with an interactive sunburst chart — scans a full drive in seconds.

VTable is not just a high-performance multidimensional data analysis table, but also a grid artist that creates art between rows and columns.

The Kubernetes Package Manager

State machines, statecharts, and actors for complex logic

Open-source JavaScript charting library behind Plotly and Dash

A proven SVG-based JavaScript diagramming library powering exceptional UIs

Business intelligence made simple

👾 AI-native Visual Analytics framework build for agents.

Official GanttProject repository.

Lightweight Knowledge Base and Feed Reader.