Started as Jekyll, but then converted to just markdown in GitHub.

My CMS is just Github basically, you can basically read and navigate the files in Github with very little content loss:

https://github.com/bcomnes/bret.io/tree/master/src

The loose collection of build tools are wrapped up in this tool: https://github.com/bcomnes/siteup

Its deployed to Neocities with this custom action: https://github.com/bcomnes/deploy-to-neocities

My stylesheet base lives here https://github.com/bcomnes/mine.css