Browse free open source Design software and projects below. Use the toggles on the left to filter open source Design software by OS, license, language, programming language, and project status.

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
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  • Automate contact and company data extraction Icon
    Automate contact and company data extraction

    Build lead generation pipelines that pull emails, phone numbers, and company details from directories, maps, social platforms. Full API access.

    Generate leads at scale without building or maintaining scrapers. Use 10,000+ ready-made tools that handle authentication, pagination, and anti-bot protection. Pull data from business directories, social profiles, and public sources, then export to your CRM or database via API. Schedule recurring extractions, enrich existing datasets, and integrate with your workflows.
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  • 1
    Pinta

    Pinta

    Simple GTK# Paint Program

    Pinta is a free, open-source program for drawing and image editing. Its goal is to provide users with a simple yet powerful way to draw and manipulate images on Linux, Mac, Windows, and BSD. Use easy drawing tools to draw freehand, lines, rectangles, ellipses, and more. Pinta includes over 35 adjustments and effects for tweaking your images. Use Pinta in your language. Pinta is at least partially translated into over 55 languages. Don't be afraid to experiment, Pinta tracks your full history so you can always undo. Use layers to help separate and group elements of your image for easy editing. Like docked windows? No problem. Floating windows? No problem. You can even mix and match. Original Pinta code is licensed under the MIT License, see license-mit.txt for the MIT License. Code from Paint.Net 3.36 is used under the MIT License and retains the original headers on source files.
    Downloads: 19 This Week
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  • 2
    Qfsm

    Qfsm

    A graphical Finite State Machine (FSM) designer.

    A graphical tool for designing finite state machines and exporting them to Hardware Description Languages, such as VHDL, AHDL, Verilog, or Ragel/SMC files for C, C++, Objective-C, Java, Python, PHP, Perl, Lua code generation.
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    Downloads: 15 This Week
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  • 3
    CSS Inspiration

    CSS Inspiration

    Curated collection of interesting, creative, or inspiring CSS effects

    CSS-Inspiration is a living gallery of modern CSS effects and components that highlights what’s possible with pure CSS and minimal markup. The collection ranges from micro-interactions and loaders to 3D transforms, complex backgrounds, hover states, and text effects, each presented as a small, self-contained demo. Source code is front and center, encouraging developers to study, copy, and tweak snippets for their own projects. Many examples lean on contemporary features—custom properties, filters, blend modes, gradients, and keyframes—serving as both inspiration and a practical cookbook. Because each demo focuses on a single idea, it’s an effective way to learn new techniques without wading through a full framework. The project thrives on experimentation and community interest, making it a frequent reference for designers, front-end engineers, and educators who want visually striking yet lightweight solutions.
    Downloads: 1 This Week
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  • 4
    Lottie

    Lottie

    Render After Effects animations natively on Mobile, Web & React Native

    Lottie is a wonderful library for Android, iOS, Web, and Windows that works by parsing Adobe After Effects animations that have been exported as json with Bodymovin, and then rendering these natively on mobile and on the web! Now you can have beautiful animations without engineers having to recreate everything by hand. Building animations by hand is time consuming, and other animation alternatives like Gifs and Png sequences don’t offer the same flexibility and varied features that Lottie offers. With Lottie, you can achieve exquisite animations exactly how you want, with no additional engineering effort whatsoever. Take a look at the many beautiful animation possibilities available to you on http://airbnb.io/lottie/
    Downloads: 1 This Week
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  • Trumba is an All-in-one Calendar Management and Event Registration platform Icon
    Trumba is an All-in-one Calendar Management and Event Registration platform

    Great for live, virtual and hybrid events

    Publish, promote and track your events more affordably and effectively—all in one place.
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  • 5
    Scrolling Game Development Kit 2
    All-in-one program for creating 2D scrolling games. Compile your games into stand-alone .NET executables or customizable C# source code. The IDE and framework are build on OpenTK, which wraps OpenGL, so generated games can be cross-platform.
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    Downloads: 6 This Week
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  • 6

    Z Word Tools

    Write, check, index and diagram Z specifications in Microsoft Word.

    Tools to allow Z specifications to be written in Microsoft Word. Includes a unicode font for Z symbols. Provides: WYSIWYG editing fully integrated into Word; Typechecking using fuzz (for Spivey Z) or CZT (for ISO standard Z); Indexing and cross-referencing; Diagrams of specification structure; Conversion from Spivey to Standard Z- also available as a stand-alone program and Java class for non-windows users. See project website for details.
    Downloads: 8 This Week
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  • 7
    TTFviewer

    TTFviewer

    TTFviewer is a small tool for developers to preview ttf font/icon file

    TTFviewer is a small tool for developers to view and preview various ttf font/icon image formats. It is based on Qt and supports windows/linux/macos.
    Downloads: 5 This Week
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  • 8
    Green, an Eclipse plugin, is an advanced yet simple UML class-diagram tool, developed primarily for student use. It does live round-tripping, so it's easy to move between diagram and code views. It's extensible: users can define their own relations
    Downloads: 1 This Week
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  • 9
    Apricot DB

    Apricot DB

    Database ERD- design tool with Reverse Engineering

    Design/Reverse Engineer/Generate Scripts/Compare Versions of all major databases with "Apricot DB" ERD- tool "Apricot DB" is a database tool for design and analysis of the relational database structure. It represents the DB- structure in the form of editable Entity/Relationship Diagrams (ERD). "Apricot DB" allows to perform reverse engineering on the existing database, as well as to create a new database structure from scratch. Allows to generate the essential DDL- scripts for CREATE/DROP/DELETE- operations based on the current ERD. "Apricot DB" supports two popular ERD notations: the "Crow's Foot" and "IDEF1x". The databases supported by Apricot DB: Oracle; SQL Server; MySQL; MariaDB; PostgreSQL; DB2/DB2 LUW; H2; SQLite Your feedback is appreciated.
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    Downloads: 2 This Week
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  • Say goodbye to broken revenue funnels and poor customer experiences Icon
    Say goodbye to broken revenue funnels and poor customer experiences

    Connect and coordinate your data, signals, tools, and people at every step of the customer journey.

    LeanData is a Demand Management solution that supports all go-to-market strategies such as account-based sales development, geo-based territories, and more. LeanData features a visual, intuitive workflow native to Salesforce that enables users to view their entire lead flow in one interface. LeanData allows users to access the drag-and-drop feature to route their leads. LeanData also features an algorithms match that uses multiple fields in Salesforce.
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  • 10
    Haydar Color Cop is a multi-purpose color picker for web designers and programmers. It features an eyedropper, magnifier, variable magnification levels
    Downloads: 2 This Week
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  • 11
    Merucav

    Merucav

    A modern digital design tool.

    A modern digital design tool made using Firebase Studio, Next.js, and Perplexity. Live app: https://merucav.netlify.app/ GitHub repository: https://github.com/Northstrix/merucav This app is built on top of https://nofpg.netlify.app and http://noegarsoux.github.io/GradientGen/ The app is fully localized into: ✅ English ✅ Hebrew ✅ Italian ✅ Latin American Spanish ✅ Brazilian Portuguese ✅ Cantonese ✅ Japanese ✅ Korean ✅ Vietnamese ✅ Hindi ✅ Polish ✅ Czech ✅ Hungarian ✅ French ✅ German ✅ Dutch
    Downloads: 2 This Week
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  • 12

    2ERPro

    Un éditeur des diagrammes Entité/Association sous Processing

    Un outil pour éditer des diagrammes Entité/Association sous Processing d'où son nom Editor of Entity/Relationship under PROcessing (2ERPro). L'outil est dans sa première version et loin d'être final. Il vise à démontrer les capacités de Processing plus qu'être éditeur dans le sens propre du terme.
    Downloads: 1 This Week
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  • 13

    newlearnerspermit

    C for programmable guitar amp

    This project experiments with C language to discover and design a programmable guitar amplifier effects micro controller computer section of a tube and solid state designed guitar amp. This a collaboration electronics project with my son. The goal of this project is to use Arduino hardware with C language programming to manipulate the guitar signal by various effects of phaser, flanger, reverb, digital delay and echo, and tremelo. Also, the signals of two microphones, two guitars, and one mp3 device will be inputted into and passed through two 3-band programmable equalizers. All of the processed signals will pass through and be amplified by a clean master volume controlled power amp. The digital effects will be toggled by means of a floor panel controlled by digital foot switch controller communication with the Arduino hardware via a digital cable. Also, the preamp signal can be alternatively connected to a separate power amp.
    Downloads: 1 This Week
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  • 14
    phpAjaxTags is a port to PHP from advanced java tag library "AjaxTags" (ajaxtags.sourceforge.net). To install - just extract zip file into Your root www dir. On-line demo http://www.2al.pl/phpAjaxTags/
    Downloads: 1 This Week
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  • 15
    .NET Color Picker

    .NET Color Picker

    A Small, Smart and Simple Color Picker for Windows

    .Net Color Picker is a very simple and smart color picker for Windows. Available for x86 and x64 Operating systems. New Features added to this beta version.
    Downloads: 0 This Week
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  • 16
    A tool to customize the Android user interface. Features: Fetch current theme, customize, push back to phone
    Downloads: 0 This Week
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  • 17
    Ant Motion

    Ant Motion

    Animate specification and components of Ant Design

    Ant Motion is a motion design specification from Ant Design, and also provide a complete solution with lots of out-of-box animations for your React applications. Use Ant Motion to quickly use animations in the React framework. We offer single, combined and complete animations solutions. In the React framework, you only need a simple piece of code to achieve animation effects, which can improve your work efficiency. With more friendly interaction, let the animate shuttle between different elements, so that the product can better talk to the user.
    Downloads: 0 This Week
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  • 18

    Automalator

    State Dependency deconstructor and mapper for C source code.

    Flowcharts not telling you what you want to know about some C source code? Try a State Dependency map! Every C source file is an implemention of a state machine. Implicit in the definition of a state machine is a network of dependencies between the states. The Automalator * deconstructs the C code into the core state machine * collates the transactions into the dependency net * generates a diagram-format file with the states and dependencies as the nodes and edges. Pre-requisites * Perl - tested with versions 5.12.3, 5.14.2 and 5.20.2, Windows, Linux and MAC * Get the Automalator by downloading the zip, or checking out or exporting the SVN trunk * copy the source code of interest into "project.c" * windows - double-click "src2map.bat" * linux & MAC - navigate the command line to the "project" folder, then run "src2map.sh" * open "project.gml" file with diagramming software.
    Downloads: 0 This Week
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  • 19
    Delphi image processing project.We are developing a program like Adobe Photoshop .All developers writes own DLL files to make a photoshop filter. Delphi ile photoshop benzeri uygulama geliştiriyoruz.Her uygulama geliştiricisi Delphi'de kendi resim iş
    Downloads: 0 This Week
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  • 20
    Javascript animation authoring environment. A WYSIWYG cross-platform desktop application using jQuery to animate XHTML and HTML elements. Its built in XUL.
    Downloads: 0 This Week
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  • 21
    Draper

    Draper

    Decorators/view-models for Rails applications

    Draper adds an object-oriented layer of presentation logic to your Rails application. Without Draper, this functionality might have been tangled up in procedural helpers or adding bulk to your models. With Draper decorators, you can wrap your models with presentation-related logic to organize and test this layer of your app much more effectively. Imagine your application has an Article model. With Draper, you'd create a corresponding ArticleDecorator. The decorator wraps the model, and deals only with presentational concerns. In the controller, you decorate the article before handing it off to the view. In the view, you can use the decorator in exactly the same way as you would have used the model. But whenever you start needing logic in the view or start thinking about a helper method, you can implement a method on the decorator instead.
    Downloads: 0 This Week
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  • 22
    FAST(Flowchart Abstract Syntax Tree) SDK is a development toolkit built upon Eclipse RCP and GEF to visualize the process of converting unstructured flowcharts in to structured ones.
    Downloads: 0 This Week
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  • 23
    FC Designer is a standalone flowchart designer written in Java.
    Downloads: 0 This Week
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  • 24
    Develope web applications for Edlington :: Rich Media Design Websites, ProjectMonitor, and GATTO Content Management System
    Downloads: 0 This Week
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  • 25
    This is a GUI library designed with the goals to be light, fast, flexible, portable, and to include all features expected from an advanced GUI. It's primarily designed for games with high demands on look and feel.
    Downloads: 0 This Week
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