The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.

🎨 Diagram as Code for prototyping cloud system architectures

HTML5 canvas based smooth signature drawing

Powerful and easy-to-use vector graphics Swift library with SVG support

🎨 Classic MS Paint, ＲＥＶＩＶＥＤ + ✨Extras

🍞🎨 Full-featured photo image editor using canvas. It is really easy, and it comes with great filters.

go chart is a basic charting library in native golang.

✏️ Storyboarder makes it easy to visualize a story as fast you can draw stick figures.

LibreCAD is a cross-platform 2D CAD program written in C++11 using the Qt framework. It can read DXF and DWG files and can write DXF, PDF and SVG files. The user interface is highly customizable, and has dozens of translations.

A canvas based drawing app that you can integrate easily on your website.

Lazy Line Painter - A Modern JS library for SVG path animation

☝️One <div>. Many possibilities.

📈 A responsive, composable react charting library with a hand-drawn style.

Using Dijkstra's algorithm ("finding the shortest paths between nodes in a graph") to draw maps 🌍.

📐⚙ 2D vector line drawing and shape modeling for CNC and laser cutters.

A canvas in your browser. Literally.

A small JS library for beautiful drawing and handwriting on the HTML Canvas.

iOS painting and drawing library based on Metal. 神笔马良有一支神笔（基于 Metal 的涂鸦绘图库）

🍂🗺️ The most powerful leaflet plugin for drawing and editing geometry layers

online image editor

A compact Android utility for constructing and drawing rounded regular polygons.

Minimalist Vector Tool

Simple GTK# Paint Program

Publication-ready NN-architecture schematics.

A View on which you can freely draw, customizing paint width, alpha and color, and take a screenshot of the content. Useful for note apps, signatures or free hand writing.

🎨 A React Native <Sketch /> component for touch-based drawing.