Open-source alternatives to Fonttools

PixiEditor is a multi-functional graphics suite that serves as a pixel art editor, a node-based graphics editor, and a vector graphics tool. It functions as a shader-based painting tool and 2D animation software, providing a comprehensive environment for creating raster images and frame-by-frame motion. The project is distinguished by its use of node-based workflows for building complex image transformations, visual effects, and custom digital brush designs. It utilizes a shader-based brush engine and a node graph to define personalized painting tool behaviors and procedural animations. The

Source-Han-TrueType is an OpenType font processor and utility designed to transform font files into the TrueType format. It serves as a typography compatibility tool, ensuring that complex font data remains functional and visually consistent across diverse digital platforms, legacy document software, and various operating systems. The project specializes in converting font outlines from cubic Bezier curves to quadratic curves, a process that optimizes path data for standard TrueType rasterization engines. By restructuring internal binary tables and re-encoding glyph indices, the tool maintain

opentype.js is a JavaScript library for reading, writing, and manipulating OpenType, TrueType, and WOFF font files in both browser and server environments. It functions as a font parser and generator capable of extracting glyph data and metadata or creating new font files by defining glyph paths and metadata programmatically. The project provides specialized utilities for modifying font variation tables to control variable font properties and processing color layers and palettes via COLR and CPAL tables. It also includes a Bezier path generator that converts font glyphs and text strings into

Optimized OpenType builder and inspector.

HarfBuzz is a text shaping engine that converts Unicode text into correctly positioned glyphs for any writing system. It processes OpenType layout features, substitution rules, and positioning tables to produce shaped glyph sequences from font data, and also handles Apple Advanced Typography font tables. The library provides a stable C API that abstracts over platform-specific font access and rendering backends, and includes a font table caching layer to avoid redundant parsing during repeated shaping operations. The project implements script-specific shaping logic for complex writing systems

A sophisticated implementation of Unicode Bidirectional Algorithm

ImageSharp is a .NET image processing library and manipulation framework used for decoding, encoding, and modifying digital images. It functions as a comprehensive toolkit for resizing, cropping, and applying pixel-level filters while managing color profiles and pixel data across various file formats. The project integrates a 2D vector graphics engine and a typography rendering engine to draw geometric shapes, paths, and complex stylized text onto images. It also includes a geometry boolean operation library for calculating intersections, unions, and differences between complex polygons and c

Paper.js is an HTML5 Canvas vector graphics library and scripting framework used for creating and manipulating 2D shapes and paths. It functions as a vector animation framework and a headless vector graphics engine, allowing for the execution of graphics operations in both browser and server-side environments. The project features a dedicated SVG import and export engine to convert between native vector items and the SVG format. It includes a specialized boolean path operation toolkit for uniting, subtracting, and intersecting vector paths to create complex geometric shapes. The library cove

AndroidNote is a technical knowledge base and reference resource for Android development. It provides comprehensive guidance on application architecture, custom view development, and advanced graphics programming. The project is distinguished by its depth in visual implementation, covering pseudo-3D perspective projections via virtual cameras and complex 2D rendering using Bézier curves and PorterDuff color blending. It also provides detailed methodologies for app modularization and the management of internal libraries through private Maven repositories and JitPack. The reference surface ext

This project is a programmable font system and canvas typography engine that renders a geometric sans-serif typeface using raw coordinate data. It functions as a coordinate-based text animator, allowing for the real-time modification of glyph shapes and font weights. The system distinguishes itself through the ability to extract and manipulate the point coordinates of characters to create morphing effects, wave animations, and shape transitions. It enables dynamic weight interpolation and point-to-line visualizations, moving beyond static font rendering to produce procedural typography. The

JPEX Software is a comprehensive reverse engineering suite for SWF binary files, serving as an ActionScript decompiler and editor. It provides a toolkit for decompiling, analyzing, and modifying the internal structure of compiled Flash content, including the extraction of scripts and media assets. The project is distinguished by its ability to perform direct binary modification, allowing users to edit bytecode and replace embedded resources without reverting to high-level source code. It includes a runtime ActionScript bytecode debugger for variable inspection and call stack analysis, as well

Intel One Mono is a monospaced font development project focused on creating high-legibility typefaces designed to reduce eyestrain and minimize errors for developers and low-vision users. It provides a system for developing and compiling custom monospaced fonts from source files for use across different operating systems and web platforms. The project implements advanced typographic capabilities, including programming ligatures to improve the readability of operators and specialized numeral formats for superscripts and subscripts. It ensures consistent text display across more than 200 langua

Canvas is a headless vector graphics engine and two-dimensional graphics rendering library built on a native graphics library with zero system dependencies for server-side drawing. It provides a programmatic shape construction and manipulation library supporting bezier curves, boolean operations, and native rendering without requiring a display server. The library renders shapes, paths, text, and images onto virtual memory surfaces and off-screen drawing areas for server-side image generation, vector animation rendering, and PDF generation. It supports path boolean operations to compute comp

The Unified Font Object (UFO) is a cross-platform, cross-application, human readable, future proof format for storing font data.

ufoLib

Provides a standard formatting so that there are meaningful diffs in version control rather than formatting noise.

ufoJS

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This project is a software engineering style guide and a curated collection of architectural patterns and coding standards. It provides a multi-language coding standard to ensure maintainable software across Ruby, Python, JavaScript, and Swift. The project establishes a development workflow specification for version control, continuous integration, and peer review to maintain a linear project history. It also includes a web accessibility framework based on ARIA and WCAG standards, using design tokens and semantic HTML patterns to build inclusive interfaces. The guides cover a broad range of

Fontello is a custom font package builder and icon font generator designed to combine selected icons from multiple libraries into a single minimized font file. It functions as a service for converting SVG vector graphics into font glyphs through automated path merging and transformations. The project provides a programmatic interface for automating icon workflows, allowing the management of configurations and the triggering of font generation via network requests for build pipelines. This enables the integration of custom font production into external automation workflows and command line too

vtracer is a raster to SVG converter and image vectorization pipeline. It transforms high-resolution scans and pixel-based images into scalable vector graphics by tracing shapes and colors. The tool includes a specialized pixel art vectorizer that converts low-resolution raster graphics into vector shapes while preserving a pixelated aesthetic. It also functions as a Bezier curve fitting tool to simplify dense point sets into smooth curves, reducing the complexity of vector paths. The project covers large scale image vectorization for gigapixel-scale data, color clustering and patch segmenta

maptalks.js is a JavaScript map rendering library and web map interaction framework used to render interactive 2D and 3D geographic data on a web canvas. It functions as a 3D geospatial engine supporting 3DTiles and GLTF formats, a GeoJSON visualization tool, and a spatial analysis library. The project distinguishes itself through high-performance rendering and dynamic geospatial animation, including the ability to simulate traffic flow and execute smooth visual transitions for map elements. It provides comprehensive tools for interactive geometry editing, allowing users to draw and modify ve

woff2 for node.js (via WebAssembly)

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ttf2woff

ttf2eot