Riot lets you build user interfaces with custom tags using simple and enjoyable syntax. It uses a virtual DOM similar to React but faster. Riot is very tiny compared to industry standards. We think there is a clear need for another UI library.
Lego Alternatives
Lego is described as 'Web-components library made lightweight and Future-proof' and is an app. There are more than 25 alternatives to Lego for a variety of platforms, including Windows, Linux, Self-Hosted, Mac and Web-based apps. The best Lego alternative is Vue.js, which is both free and Open Source. Other great apps like Lego are Angular, React, Svelte and Vite.
Alternatives list
Polymer is a library that uses the latest web technologies to let you create custom HTML elements. Build anything from a button to a complete application as an encapsulated, reusable element that works across desktop and mobile.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux

- 57 Fresh Web Framework alternatives
Fresh is a next generation web framework, built for speed, reliability, and simplicity. Some stand out features:
Aurelia is a JavaScript client framework that leverages simple conventions to empower your creativity.

- 39 Elm alternatives
Elm aims to make web development more pleasant. Elm is a type-safe, functional reactive language that compiles to HTML, CSS, and JavaScript.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
JavaScript Library / HTML5 UI framework for developers with SpreadSheet, Pivot, Kanban, FileManager, Scheduler, Datatable, TreeTable and etc. widgets.
Cost / License
- Pay once
- Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Chrome OS
- Android Tablet
- Windows Phone
- iPad
- Blackberry 10

Webix UI is the most popular Android, iPhone, iPad & Android Tablet alternative to Lego.
- Webix UI is Paid and Open Source
A toolchain for building reusable, scalable Design Systems. Generate small, blazing fast, and 100% standards based Web Components that run in every browser.
Cost / License
- Free
- Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Self-Hosted
- JavaScript
Mithril is a modern client-side Javascript framework for building Single Page Applications. It's small (< 8kb gzip), fast and provides routing and XHR utilities out of the box.
A non-opinionated, totally customizable JavaScript framework designed for writing programs that scale across any platform.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux
- Online
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
Small (5 Kb Gzipped), flexible, easy to use, component-oriented javascript template engine.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux



























