It's a Git web frontend like cgit or gitweb, but it's statically generated and this is it self hosted.

The title is descriptive and there's a more info in the README.

Perhaps the default view should be README and file listing like in GitHub, so it would have been even more obvious.

This part of the README pretty much tells you everything you need to know:

    Features
    --------
    - Log of all commits from HEAD.
    - Log and diffstat per commit.
    - Show file tree with linkable line numbers.
    - Show references: local branches and tags.     
    - Detect README and LICENSE file from HEAD and link it as a webpage.     
    - Detect submodules (.gitmodules file) from HEAD and link it as a webpage.
    - Atom feed log (atom.xml).
    - Make index page for multiple repositories with stagit-index.  
    - After generating the pages (relatively slow) serving the files is very fast, 
      simple and requires little resources (because the content is static), only     144 a HTTP file server is required.
    - Usable with text-browsers such as dillo, links, lynx and w3m.

    Cons 
    ----
    - Not suitable for large repositories (2000+ commits), because diffstats are     152 an expensive operation.
    - Not suitable for repositories with many branches, a quite linear history is
      assumed (from HEAD).
    - Relatively slow to run the first time (about 3 seconds for sbase,
      1500+ commits), incremental updates are faster.
    - Does not support some of the dynamic features cgit has, like:
      - snapshot tarballs.     
      - file tree per commit. 
      - history log of branches diverged from HEAD.
      - stats (git shortlog -s). 
        this is by design, just use git locally.

>Perhaps the default view should be README and file listing like in GitHub, so it would have been even more obvious.

This would actually be pretty easy go do, since one would just have to re-link "index.html" from pointing to "log.html" to "./file/README.html"

It looks like this is the GitHub for the project: https://github.com/oxalorg/stagit

Actually http://git.2f30.org/stagit/ is the real host, what you linked was just a mirror. If you go up one level on the site, you can find a list of projects hosted by the 2f30 team, including stagit, which was made by Hiltjo Posthuma (one of the Suckless guys, iirk)

Definitely looks pretty similar

I believe the website is an example of its output.

The README is right at the top of the page ?