what does it do?
It's a static site generator written in PHP.
Actually it seems to be a Flat file CMS and not a static site generator.
There's a really big difference. A static site generator has a build command and spits out a whole site in just plain HTML/CSS/JS that you can host directly on a web server or a CDN without any dynamic code needed to serve the site.
This means you can put everything on a CDN, it eliminates all the security risks you get from running PHP (or Ruby, Node, etc) on your servers and makes it trivial to scale to even millions of visitors.
A flat file CMS on the other hand, is just like any other dynamic CMS except that it uses flat files on a filesystem to store content instead of a database.
This makes it a bit simpler to host (as long as you host it on just 1 server) since you don't need a DB installed, but it'll often be slower than a database backed CMS, harder to scale and no more secure (you're still running PHP code on every request).
Actually for most smaller sites, a flat file CMS will load/perform MUCH faster than one driven by a database. Especially when most people would be using massively bloated platforms like drupal, wordpress, etc.
Couple that with the portability of a flat file site and ease of customization for someone with light coding skills, flat-file is often the perfect choice for informational or portfolio type sites.
To everyone not getting what this is, here is my understanding: it could be useful if you have a client w/ a classic Apache/PHP server who only has the FTP credentials and for some weird reason, you cannot have anything else.
And they still want a CMS.
This happends to me about once a month :P
Dafuq is this?
Since when did it become acceptable to put a download link with barely any explanation as to what it is? My proverbial gears have been grinded.
I guess you never seen links before in your life? cause there's one linking to the docs page that's pretty simple to use.
Sure, there's a link to the docs page—if I care to click on it, which I don't, because the page didn't make me care enough or tell me anything about the product.