Graphite is a free, open-source vector and raster graphics editor with a fully nondestructive editing workflow. It combines layer-based compositing with node-based generative design, enabling procedural content creation. The system is architected as a multi-crate Rust workspace with a desktop application (using Chromium Embedded Framework for UI and wgpu for GPU rendering) and a web frontend (Svelte + Vite compiled to WebAssembly). The core document model is a node graph executed by an interpreted runtime with GPU shader support via rust-gpu. Storage uses a CRDT-based format (`.gdd`) with content-addressed deltas, history, and session state, supporting collaborative editing and undo/redo. The editor features a comprehensive tool system (select, pen, brush, shape, text, etc.), a node graph editor, color management, raw image decoding, and vector path operations. The frontend communicates with the Rust backend through a message-passing architecture with hierarchical message types and a dispatcher pattern. The project also includes a CLI tool for export, a build system (cargo-run), and extensive developer tooling (bisect tool, crate hierarchy visualizer, node documentation generator).
p5.js is a JavaScript library for creative coding, providing a comprehensive API for 2D/3D graphics, animation, interaction, and data visualization. It is designed for artists, designers, and educators, with a focus on accessibility and beginner-friendly error messages. The architecture is modular: a core module registers addons for color, shape, WebGL, DOM, I/O, math, and more. It supports multiple renderers (2D canvas, WebGL 3D, experimental WebGPU) and includes a sophisticated shader compilation pipeline (strands) that transpiles a p5.js-like DSL to GLSL/WGSL. The codebase is well-structured with extensive unit and visual regression tests, and it follows a consistent addon registration pattern for extensibility.
Pixelorama is a full-featured open-source pixel art editor built with the Godot Engine (GDScript). It provides a professional-grade environment for creating pixel art, sprites, tiles, and animations. The application includes a rich set of drawing tools (pencil, line, curve, shape tools, bucket, gradient, shading), selection tools (rectangle, ellipse, lasso, magic wand, color select), and a comprehensive layer system supporting pixel, group, tilemap, 3D, and audio layers. Animation is handled through a timeline with keyframe interpolation, onion skinning, and frame tags. The editor supports a variety of import and export formats including Aseprite, Krita, Photoshop, Piskel, PNG, GIF, APNG, MP4 (via FFmpeg), and its own .pxo project format. It features a dockable UI, customizable shortcuts, extension support, shader-based non-destructive layer effects, and a built-in noise generator and gradient editor. The codebase demonstrates a well-structured tool inheritance hierarchy, a robust undo/redo system, and several reusable custom UI widgets and addons.