Dev tools · alternatives · 2026

24 alternatives to Neptune CSS

A free and open source CSS framework

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Neptune CSS launched in 2023; newer entries below may have overtaken it.

1. 1
   Tailwind CSS▲425

   A utility-first CSS framework for rapid UI development

   2017 · its alternatives →

2. 2
   Shorthand CSS▲169

   Feature rich CSS framework for the new decade

   2020 · its alternatives →

3. 3
   Tailwind CSS v2.0▲390

   Rapidly build modern websites without ever leaving your HTML

   2020 · its alternatives →

4. 4
   Turtle CSS▲4

   Open Source Easy to Use , Minimal but Powerful CSS Framework

   2018 · its alternatives →

5. 5
   sea.css▲5

   sea.css is a simple and easy to use css framework.

   2020 · its alternatives →

6. 6
   Renaissance▲141

   The freshest CSS framework

   2018 · its alternatives →

7. 7
   EnjoyCSS▲138

   CSS generator for rich graphical styles without coding

   2014 · its alternatives →

8. 8XC
   XP.css – Windows XP CSS file and framework for building GUIs▲297

   2020 · botoxparty.github.io · its alternatives →

9. 9AM
   A maximalist CSS framework for full stack developers▲52

   2020 · ridgecss.com · its alternatives →

10. 10
    Spectre.css▲162

    A lightweight, responsive and modern CSS framework

    2016 · its alternatives →

11. 11
    Tailframes▲103

    Open Source components library for React & Tailwind CSS

    2024 · its alternatives →

12. 12
    Layer CSS▲152

    Lightweight CSS framework to build your own fluid layouts

    2015 · its alternatives →

13. 13
    Open-Source Page Block Builder with Remix and Tailwind CSS▲155

    2022 · remix-page-blocks.vercel.app · its alternatives →

14. 147C
    7.css – for all Windows 7 lovers▲64

    2021 · khang-nd.github.io · its alternatives →

15. 15
    Picnic CSS▲131

    A beautiful CSS library to kickstart your projects

    2016 · its alternatives →

16. 16AS
    A simple lightweight CSS grid, not a bloated framework▲134

    2012 · thisisdallas.github.com · its alternatives →

17. 17
    Puppertino▲143

    A CSS framework based on Apple's design and human guidelines

    2020 · its alternatives →

18. 18OS
    Open Source TailwindCSS UI Components▲148

    Free Tailwind html UI Components - built to create landing pages and websites. Easyfrontend UI components are free and open-source. Copy paste the components to update your existing site or create a new site from it.

    2024 · github.com · its alternatives →

19. 19
    MetalliCSS▲64

    Versatile metallic finish for your CSS

    2022 · its alternatives →

20. 20
    hack.css▲174

    The CSS framework for hackers

    2016 · its alternatives →

21. 21AS
    A simple, plain, minimal, classless CSS for simple, plain HTML pages▲128

    2020 · github.com · its alternatives →

22. 22
    Skeleton 2.0▲127

    A dead simple, responsive CSS boilerplate.

    2014 · its alternatives →

23. 23
    System.css▲116

    A design system for building retro Apple UIs

    2022 · its alternatives →

24. 24
    Bamboo CSS▲101

    A classless CSS utility for your HTML

    2021 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →