What is a flat file?
@ https://unix.stackexchange.com/questions/333753/what-is-a-flat-file
Useful answers regarding the definition and examples of usage for flat files.
Flat file CMS
@ https://github.com/ahadb/flat-file-cms
An implementation of a content-management system based on a flat file.
Recutils
@ https://www.gnu.org/software/recutils/
A flat file database that is human editable and supported by UNIX-like systems.