WonderCMS? I go back to it periodically. But honestly, I always find a reason to use something a little more robust. But, maybe it’s all you need?
https://www.wondercms.com/
It’s pretty cool. Flat file, which has advantages and disadvantages. But an advantage is being able to easily move your site around anywhere with little set up. From a USB stick to a server to the moon. It’s fast. It’s tiny.
