Here are some of the most popular (CMS) website platforms, listed in order of their current popularity (Mar 2023):

1. WordPress
2. Shopify
3. Wix
4. Squarespace
5. Joomla
6. Drupal
7. Magento
8. Weebly
9. Blogger
10. Ghost

Popularity of website platforms can vary based on factors such as industry, country, and other variables, so this list may not be comprehensive or completely accurate for every context, rather it is a general picture of the approximate usage of the platform. HERE is a good overview of each of these and some others.