Browse free open source JavaScript Design Software and projects below. Use the toggles on the left to filter open source JavaScript Design Software by OS, license, language, programming language, and project status.
PRTG Catches Network Issues Before They Cause Downtime
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Go from Code to Production URL in Seconds
Cloud Run deploys apps in any language instantly. Scales to zero. Pay only when code runs.
Skip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
The design language that makes your AI harness better at design
Impeccable is a design skill system that helps AI coding tools produce better frontend interfaces by giving them a richer design vocabulary. It provides one comprehensive skill, multiple commands, and curated reference files covering typography, color, motion, spacing, interaction, responsive design, and UX writing. The project is built to counter common AI-generated design habits such as generic SaaS layouts, overused fonts, nested cards, weak hierarchy, and predictable gradients. It can be installed across several AI coding environments, including Claude Code, Cursor, Codex, Gemini CLI, GitHub Copilot, and others. Impeccable also includes deterministic anti-pattern detection through a CLI and browser extension without requiring an API key. It is most useful for developers and designers who want AI-generated interfaces to feel more polished, intentional, and product-aware.
Zotero Style, also known as Ethereal Style, is an open-source Zotero plugin that enhances the reference library interface with visual reading indicators and customizable columns. It helps researchers monitor their progress through academic papers and organize collections more effectively. Reading activity can be displayed as color gradients behind document titles. A dedicated progress column visualizes annotation activity across PDF pages. The plugin distinguishes read and unread references through title formatting. It also provides a separate column for tags and additional library organization controls. Its interface enhancements allow researchers to identify unfinished readings and manage large literature collections without opening every document.
GitHub-Dark is a userstyle that transforms GitHub’s interface into a coherent dark theme, covering repositories, issues, pull requests, gists, and profile pages. Distributed as a CSS stylesheet intended for the Stylus browser extension, it applies a comprehensive palette, rebalances contrast, and refines syntax colors for code views to ensure readability in low-light settings. The project goes beyond simple inversion by thoughtfully adjusting backgrounds, borders, badges, and diff highlights so the UI feels native rather than “flipped.” It includes targeted fixes for edge cases across GitHub’s many subpages, aiming for consistency while preserving the information hierarchy of the original design. Users can apply the theme selectively, override variables, or combine it with other userstyles to fit personal preference. Even with GitHub’s own theme options, GitHub-Dark remains a carefully tuned alternative for people who want a specific aesthetic or more granular control.
HTML5 Boilerplate is a popular and professional front-end template that lets you build fast, robust and adaptable web sites or applications. It’s built with the combined knowledge and effort of hundreds of developers over a span of years, creating a powerful tool in one small package.
HTML5 Boilerplate comes loaded with great features, such as HTML5 support, optimized Google Analytics snippet, jQuery and Modernizr, and so much more. It supports the latest and most popular browsers and does not impose a specific development philosophy or framework, so you can code any way you want.
New customers can spin up VMs, build with AI, and query data at no cost.
Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
iView is a high quality, open source UI Toolkit built on Vue.js, offering dozens of useful and beautiful components including fonts, icons, layouts, navigation and more. Each component has several options for you to choose from, giving you absolute freedom and choice to achieve the exact look you would like for your interface.
iView also comes with a customizable default theme and a friendly API that's easy for people of any skill level. It's default language is Chinese but it does support plenty of other languages. iView currently supports both Vue.js 2 and Vue.js 1.
Ready-to-use HTML and CSS UI elements provide the foundation for Salesforce experience development. Visual design values and attributes that ensure branding and UI consistency at scale. Design principles and best practices that guide beautiful, consistent, user-friendly product experiences. Easy-to-use tools help all Trailblazers optimize workflows and bring Salesforce ideas to life. Start building immediately, without worrying about detailed specs. SLDS lets you focus on the big picture to deliver the best possible user experience. Manage design at scale, with a living design system that evolves as needs change. SLDS keeps apps, interfaces, and tools consistent no matter how fast the system grows. SLDS saves time and energy, freeing designers and developers to focus on larger issues of usability and meaning. Standardized, reusable components support collaboration, reinforce branding, and provide a consistent look and user experience.
Software for design single skin kites, speedgliders and paragliders
All-in-one software for desing single skin paragliders like Ozone XXLite. Allow to modify wing shape, profile, settings. Allow to print sew templates with scale 1:1 in A4 or other small printer's formats.
Export sew templates to DXF.
Main code writen in Javascript, GUI writen in Visual C# 2010 Express.
A desktop application for Penpot, an open-source design tool
Penpot Desktop is a free, open-source, unofficial desktop application for accessing the Penpot design platform. It brings Penpot's browser-based interface into a dedicated application for Windows, macOS, and Linux. Users can create interface designs, illustrations, interactive prototypes, and reusable design components through the integrated Penpot workspace. The application supports multiple tabs, allowing designers to navigate between projects without opening separate browser windows. It can connect to official Penpot servers, self-hosted deployments, and locally running instances. A built-in local instance creator uses Docker to enable offline design workflows. Penpot Desktop also provides configurable appearance settings, project batch exports, and automatic reloading in view mode.
synthwave-vscode is a visual theme extension for Visual Studio Code that gives the editor a retro, neon-drenched look reminiscent of 1980s synthwave aesthetics. It applies a dark base palette with bold accent colors, glowing highlights, and sharp contrasts to bring an edgy, stylized atmosphere to coding sessions. Syntax highlighting is tuned to balance readability with dramatic flair, ensuring code elements don’t get lost while preserving the cool visual vibe. The theme also includes optional “neon glow” effects on UI elements, cursor styles, and sidebars for users who want a more immersive style. Many users choose it to inject personality into their development environment—especially in late-night coding sessions. Because it’s just a theme, it can be layered with other UI tweaks or paired with complementary icon packs and UI themes in VS Code.
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slick is an open source, responsive carousel plugin that offers a great number of breakpoints, CSS3 transitions, touch events and so much more. It creates fully responsive, customizable and mobile-friendly carousels that can work with any html element.
Everything you’ll ever need for your carousel, slick can achieve quickly and easily. It features a comprehensive range of settings, events, methods and more so you can build a carousel in exactly the way you want. It supports IE8+ as well as most modern browsers (Chrome, Firefox, Safari). See it in action in demos on http://kenwheeler.github.io/slick/
GitHub Buttons is a lightweight web project for embedding GitHub-related action buttons and live repository or profile statistics on websites. It can display actions such as starring, watching, forking, following, and sponsoring directly from a compact interface. Dynamic counts are retrieved from GitHub so displayed stars, watchers, forks, or followers stay current. Buttons can optionally hide their text or count and can be rendered in regular or large sizes. The project compiles its HTML, CSS, and JavaScript into a self-contained button page suitable for embedding. Its companion site provides a simple generator for configuring buttons without manually constructing parameters. The project is designed for developers who want recognizable GitHub engagement controls with minimal setup.
The most complex and innovative Dashboard Made by Creative Tim. Check our latest Freebie Bootstrap 5 Dashboard with a fresh, new design inspired by Google's Material Design 2. Designed for those who like bold elements and beautiful websites, Material Dashboard 2 is ready to help you create stunning websites and web apps. We created many examples for pages like Sign In, Notifications, Profile, and so on. Just choose between a Basic Design, an illustration, or a cover and you are good to go. Material Dashboard 2 is built with over 60 frontend individual elements, like buttons, inputs, navbars, nav tabs, cards, or alerts, giving you the freedom of choosing and combining. All components can take variations in color, which you can easily modify using SASS files and classes.
A color generator for JavaScript. There are lots of clever one-liners for generating random colors. Unfortunately, this code naturally produces murky greys, browns and greens. randomColor generates attractive colors by default. More specifically, randomColor produces bright colors with a reasonably high saturation. This makes randomColor particularly useful for data visualizations and generative art. Once you’ve included randomColor.js on your page, calling randomColor() will return a random attractive color. Beneath is the output of randomColor called 54 times. You can also pass an options object to randomColor. This allows you to specify the hue, luminosity and the number of colors to generate.
Skill‑Map is an open-source, collaborative project—originating from Geekbang—offering a structured visualization of programmer skill maps across domains like AI, front-end, backend, architecture, DevOps, and more. It serves as a navigable resource to organize learning paths and essential knowledge areas. Covers areas like AI, big data, architecture, frontend, backend, DevOps, testing, etc. Visual representation of programming and IT skill domains. Encourages community collaboration and feedback via GitHub Issues. Open to content updates, additions, and evolution as a living reference.
iScroll is a high-performance JavaScript scroller built to bring smooth scrolling behavior to web interfaces across desktop, mobile, and smart TV environments. It was designed to be small, dependency-free, and optimized enough to work well on both modern and older devices. The library goes beyond basic scrolling by supporting zooming, panning, infinite scrolling, parallax effects, and carousel-style interactions. Developers can control scroll coordinates, customize easing behavior, and listen to detailed scrolling events during user interaction. The project includes several builds, such as the general version, a lighter mobile-focused version, a probe version for tracking scroll position, and a zoom-enabled version. The repository is archived and read-only, so it is best suited for legacy projects, reference use, or maintaining existing interfaces that already depend on iScroll.
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.
Drag and Drop basic webpage and website builder
Icon by http://www.kameleon.pics
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Get your Simple Wysiwyg HTML Editor on Play Store:
https://play.google.com/store/apps/details?id=com.ulm.simplehtmleditor
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Extended release:
- Chrome extension: - https://chrome.google.com/webstore/detail/boot-wysiwyg/gjmamibgdidamicoandlflamngdmmeig
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Desktop app built using Electron framework and NodeJS.
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Official download also on Softpedia® - https://bit.ly/2AGwc7a
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Requirements:
- Processor: Intel Pentium 4 processor or later that's SSE2 capable
- RAM: 512 MB
- Hard Disk: 1500 MB
- Video Card: nVidia, ATI and Intel Shader Model 2 and Shader Model 3 video cards with 512 megabytes of RAM minimum
- Supported OS: Windows 10, Windows 8, Windows 8.1, Windows 7
While coding with AI assist, I noticed bigger projects need something more rigid as context so the AI coder doesn't stray away when I try to add new features. You know, to keeps its memory fresh and not change the stuff that already works.
The trick is to ask the AI to write a diagram in Mermaid.js format that solidifies the structure of the project and then use that as context to keep the AI reminded at all times what the project is as a whole. This will prevent it from changing things its not supposed to change.
This standalone offline web app will convert that mermaid.js code into a visual SVG image so that YOU as a human will be able to understand what the AI think about the structure of your projects so you can see it and fix any misconceptions until the diagram is correct for your project.
(Source code is included in the html itself. Open it in a web browser to use.)
Open Source Reporting & Data Visualization Platform
BIRT is an open source technology platform used to create data visualizations and reports that can be embedded into rich client and web applications. Developers who use BIRT Designer are able to access information from multiple data sources easily and quickly in order to create reports and applications with stunning data visualizations.
Actuate now provides a free report server, BIRT iHub F-Type, to deploy BIRT content so developers don't have to build their own infrastructure. With a flexible Open Data Access framework, developers can write custom data drivers to access data from any source, including Big Data sources like Apache Hadoop, Cassandra, and MongoDB, along with all traditional relational databases, Flat Files, XML data streams, and data stored in proprietary systems. Built for embedding, BIRT includes APIs for data access, chart generation, output formats, content execution, and integration within larger applications.
Mac OS X and Windows OpenGL 3D Engine tools, content and code to create games and applications. Newton physics, OpenAL sound with OGG Vorbis, Lua, Revolution, written in C.
Olympos is an holistic MDA/MDD approach to projects. It allows to create Web (PHP, J2EE), Desktop (c#) and Mobile applications (.NET, J2ME) from a UML model. Features a Web 2.0 IDE, a generator based on openArchitectureWare and several cartridges.
HTML/CSS/JS and Markdown Playground For Web Designers and Developers
kodeWeave is a realtime coding playground for HTML, CSS and Javascript. Similar to JSFiddle and JSBin, but kodeWeave was made to work offline but also as a prototyping application to build applications for desktop operating systems while on mobile devices. (PhoneGap Build is recommended for mobile devices)
kodeWeave similar to jsfiddle, jsbin, dabblet, liveweave, codepen, cssdeck, cssdesk, tinkerbin, d3 playground, plunker and pastebin, but allows you to export your web app as a desktop and/or chrome application.
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