Open-source alternatives to Pinta

Imagine is an object-oriented PHP image processing library and manipulation framework. It provides a unified interface for performing transformations, cropping, and scaling images across different backend processing engines. The library abstracts multiple underlying image processing drivers through a common adapter-based interface, ensuring consistent API behavior. It utilizes a unified object model to map high-level requests to engine-specific operations and employs a lazy-evaluation transformation queue to defer the execution of filters until the final output is requested. Its capabilities

OpenToonz is a professional 2D animation production suite used to create animated sequences through a digital pipeline. It functions as a comprehensive animation timing manager and HD animation renderer, coordinating drawing sequences and cinematography using digital exposure sheets. The software is distinguished by a raster-vector hybrid pipeline and a node-based compositing engine for visual effects synthesis. It employs a palette-based color management system that decouples color data from geometry, allowing for global character color adjustments across multiple files without reprocessing

PostProcessing is a post-processing stack for the Unity game engine designed to apply image-space visual effects and color grading to rendered scenes. It functions as a real-time image effect pipeline that processes frames after the primary 3D geometry has been drawn. The system includes a screen space visual effects library and an HDR color grading toolset used to adjust high dynamic range colors and contrast. These tools allow for the application of real-time image filtering to modify lighting, colors, and mood. The framework supports 3D scene post-processing and game environment polishing

This project is a browser-based graphics editor and image processing library that performs visual transformations directly within the web environment. It provides a toolset for loading local image files, applying complex visual effects, and exporting the modified results without requiring server-side data processing. The library utilizes hardware-accelerated fragment shaders to execute pixel-level operations on the graphics processing unit. By maintaining image data as textures within GPU memory and using an immediate-mode rendering pipeline, the system achieves real-time synchronization betw

Pixelorama is a cross-platform digital art multitool designed as a pixel art editor, frame-based animation tool, and tilemap design suite. It provides specialized utilities for drawing low-resolution sprites with pixel-perfect precision and generating sprite sheets for game engines. The software distinguishes itself through a dedicated tilemap design system supporting rectangular, isometric, and hexagonal sets, and a frame-based animation system featuring onion skinning and audio synchronization. It also includes a plugin system that allows the installation of community-developed tools for as

Photon is a high-performance image processing library written in Rust. It serves as a pixel manipulation toolkit and image format transcoder, providing a WebAssembly graphics engine for executing visual effects and transformations directly within web browsers. The project is built around a functional image pipeline, which allows for the programmatic chaining of sequential transformation operations. This architecture supports the creation of complex visual effects through a coded pipeline. The library covers a wide range of image processing capabilities, including color management across mult

Ulauncher is a keyboard-driven application launcher and extensible command palette for Linux desktop environments. It provides a searchable interface for launching installed software and navigating local files. The system features a Python-based plugin architecture that allows the integration of third-party extensions and custom functionality. It includes a themable interface that supports custom color schemes and visual styles to match the system environment. Core capabilities include fuzzy-string matching for software and file retrieval, an integrated mathematical calculator for instant ev

Bild is an image processing library implemented in the Go programming language. It provides a collection of algorithmic engines for image manipulation, including a convolution kernel engine for filtering, an image blending tool for layer composition, and a procedural noise generator for creating synthetic textures. The project is distinguished by its procedural generation capabilities, implementing Perlin, Gaussian, binary, and uniform noise algorithms to produce random pixel distributions and organic patterns. It also features a command-line interface that allows users to apply visual effect

Enquirer is a Node.js library for creating interactive command-line interfaces to gather structured user input. It provides a set of terminal prompts, including menus, forms, and text fields, to collect data via autocomplete, multiselect, and boolean confirmations. The project serves as a customizable framework that allows for the creation of custom prompt types through a base class and the extension of functionality via a plugin architecture. The library covers a wide range of interaction patterns, such as capturing numerical and sensitive data, validating user input against custom rules, a

This project is a server-side PHP library designed for managing file uploads and performing automated image processing. It provides a structured toolkit for ingesting, validating, and migrating files from temporary staging areas to permanent storage while enforcing security constraints. The library distinguishes itself through a configuration-driven pipeline that executes a sequence of transformations on image buffers. It supports a wide range of geometric adjustments, including resizing, cropping, and rotation, alongside advanced visual enhancements such as watermarks, color adjustments, and

LibreSprite is a digital art application for designing precise pixel characters and objects. It functions as a 2D sprite editor, palette-based image editor, and pixel art animation software. The application specializes in creating frame-based pixel art animations using onion skinning and layer management. It also includes a tiled texture creator for producing seamless repeating patterns and textures through a synchronized tiled viewport. The software covers a broader range of game asset pipeline capabilities, including the creation of static pixel art and the management of fixed color palett

CSSgram is a CSS image filter library and framework that provides a system of reusable mixins and classes for implementing visual image effects. It enables CSS-based image processing to modify the appearance of images directly in the browser without requiring server-side processing. The project facilitates client-side photo processing and frontend visual styling by applying photographic style filters and color presets to web images. It uses a combination of CSS filters and blend modes to achieve these effects through the assignment of predefined class names to HTML elements.

Tilix is a tiling terminal emulator for Linux that uses GTK+ 3 widgets for native desktop integration and theming. It arranges multiple terminal sessions in a resizable grid layout, allowing users to split the window into several panes simultaneously. The application is built on the VTE terminal emulation engine and uses the Meson build system for compilation. The terminal supports synchronized input broadcasting, where keystrokes typed in one pane are replicated to all grouped terminals via D-Bus inter-process communication. It also offers a Quake-style drop-down mode that slides a terminal

This project is a modular image manipulation framework and processing pipeline library designed for Ruby applications. It provides a programmable interface for executing complex image transformations, including resizing, cropping, rotating, and compositing, while managing file input and output parameters. The library distinguishes itself through a fluent, chainable interface that allows developers to construct sophisticated processing workflows by linking modular operations together. It functions as an image transformation engine that delegates heavy lifting to external native binary tools, e

Armortools is a 3D PBR texture painting suite and mesh texture workflow tool. It provides a system for painting physically based rendering materials directly onto 3D meshes using a combination of layer and mask support, a GPU-accelerated texture baker for extracting geometry data from high-polygon models, and a node-based material editor for creating procedural textures. The software features integrated neural network tools for AI texture authoring, allowing the generation of PBR maps from text prompts, image-based material extraction, and texture upscaling via local nodes. It also implements

This project is a collection of reference guides and reusable patterns for implementing CSS layouts, typography, and visual effects. It serves as a library of style snippets and implementation guides for structuring web pages and creating common user interface patterns. The repository provides specialized galleries for visual effects and UI component patterns. These include techniques for creating glassmorphism, complex geometric shapes, and interactive elements such as accordions, tooltips, and animated tab indicators. The project covers a broad range of frontend capabilities, including res

Piskel is a web-based graphics tool and pixel art editor designed for creating static sprites and frame-by-frame animations. It functions as an animated sprite creator that produces single frames and sprite sheets with adjustable scaling and layout. The project provides a grid-based interface for producing digital art and game assets. It supports both the creation of animated sequences for game characters and the design of static images tailored for game engines. The tool includes capabilities for layer-based composition and frame-based animation sequencing. It also offers a standalone deskt

Budgie Desktop is a graphical workspace environment for Linux systems that integrates window management, application launching, and system control tools. Built upon the GTK toolkit, it provides a unified shell for organizing open windows and interacting with daily computing tasks. The environment distinguishes itself through a modular, plugin-based panel architecture that allows for the dynamic loading of applets into a shared container. It utilizes a centralized object-oriented framework to manage component lifecycles and relies on a dedicated service for secure, authenticated handling of ad

Akira is a native Linux application and vector graphics editor designed for creating professional user interface layouts and user experience flows. Built with the Vala language, it functions as a GTK UI design tool for developing visual elements and interface components. The software provides a desktop environment for UI and UX design, enabling the creation of professional layouts and the prototyping of user interaction flows. It specifically supports the construction of GTK interface layouts and Linux-based UI designs.

GPUImage2 is a Swift framework for applying real-time filters and effects to images and video using the GPU. It provides a real-time video filter library, an image geometry manipulation engine, and an OpenGL shading pipeline for processing visual data on graphics hardware. The framework enables the construction of visual effect pipelines by chaining image sources to consumers in sequential flows. It supports the development of custom fragment and vertex shaders for bespoke image processing and offers the ability to bundle these operations into reusable units via graph-based grouping. Capabil

Thumbnailator is a Java image thumbnailing library designed for generating resized images with aspect ratio preservation and high-quality scaling. It serves as a toolkit for rotating, cropping, and adjusting the opacity of images within Java applications. The library is distinguished by its ability to function as an Exif-aware image processor, automatically rotating thumbnails based on embedded orientation metadata. It also provides specialized utilities for digital watermarking, allowing secondary images and branding markers to be overlaid with adjustable transparency. Core capabilities cov

Cinnamon is a desktop environment interface for Linux operating systems. It provides a visual layout and user interface for managing windows and applications, focusing on desktop workflow management. The project enables Linux GUI customization, allowing the look and feel of the environment to be modified. It includes a window management system to handle the placement and behavior of application windows within the workspace. The environment utilizes a JavaScript-based shell and a modular applet architecture for extensibility, while using CSS for component styling. The interface is built with

Piper is a GTK desktop application and client interface designed to manage gaming peripheral hardware settings. It serves as a visual tool for configuring mice and keyboards by communicating with the libratbag background daemon. The application provides a graphical interface to adjust hardware-level settings without the use of proprietary vendor software. This includes a dedicated configuration UI for gaming mice to manage DPI and other device-specific parameters. The tool covers several hardware customization areas, including RGB lighting patterns, mouse button remapping, and cursor sensiti

RmlUi is a cross-platform UI renderer and middleware library that enables the creation of user interfaces using a subset of HTML and CSS. It functions as a rendering-agnostic layer designed to integrate web-standard layout and styling into custom game engines and embedded applications. The framework is distinguished by its integration of Lua for dynamic logic and control, as well as a specialized toolkit for rendering SVG images and Lottie animations. It utilizes a pluggable rendering backend that decouples geometry generation from the final display, allowing it to generate textured geometry

imutils is a computer vision utility toolkit and image processing library designed to simplify common manipulation tasks using OpenCV. It serves as an image analysis helper and geometry transformation tool for automating visual data processing. The toolkit provides specialized capabilities for maintaining image integrity during transformations, such as resizing images while preserving aspect ratios and rotating images without cropping corners. It also includes tools for four-point perspective warping to create top-down views and the extraction of topological skeletons from binary images. The

This project is an image processing library designed for manipulating pixel data, applying visual filters, and adjusting image appearance. It functions as a low-level tool for processing raw pixel buffers and managing image data. The library provides a toolkit for image geometry manipulation, including resizing, cropping, flipping, and rotating images. It also serves as an image format converter for encoding and decoding data between common binary file formats and as a metadata extractor for retrieving dimensions and color profiles from file headers. The capabilities cover low-level image pr

Pica is a client-side utility for browser-based image scaling, format transformation, and file optimization. It functions as a canvas image processor that transforms data between canvas elements, bitmaps, and blobs for local manipulation within the web browser. The library distinguishes itself through high-quality downscaling using Lanczos resampling and a multi-threaded processing model. It utilizes web workers to split image processing into tiles across CPU cores to increase resizing speed. The project covers a broad range of image manipulation capabilities, including high-quality scaling