flexible.gs Alternatives

HTML KickStart is a ultra–lean set of HTML5, CSS, and jQuery (javascript) files, layouts, and elements designed to give you a headstart and save you a lot of hours on your next web project.

Open Source

RealityMAX is the AI-powered 3D design collaboration platform, 100% online. Cooperate remotely with your colleagues on 3D projects and easily share your work with clients. Create Web3D and AR experiences in a snap, without a line of code.

Key RealityMAX features:

AI image enhancer Upload multiple 3D models Edit 3D model materials Change 3D model texture

Visit website freemium $40.0 / Monthly (Pro with up to 500 GB of storage space)

Simple and flexible HTML, CSS, and JS for popular UI components and interactions.

Key Bootstrap features:

Responsive Design Pre-designed Components Cross-browser Compatibility Extensive Documentation

Open Source

A rock-solid default for HTML5 awesome.

Key HTML5 Boilerplate features:

Standardized Best Practices Cross-Browser Compatibility Performance Optimization Security Enhancements

Open Source

A set of small, responsive CSS modules that you can use in every web project.

Key Purecss features:

Lightweight Responsive Modular Easy Integration

Open Source

A modern responsive front-end framework based on Material Design.

Key Materialize CSS features:

Responsive Design Material Design Component Variety Customization

Open Source

Rock solid freelance contracts in minutes.

Key Ink features:

Responsive Design Easy Customization Comprehensive Documentation Modular Components

Open Source

The most advanced responsive front-end framework in the world.

Key Foundation features:

Customizability Responsive Design Semantic Code Range of Components

Open Source