Drupal comes with the blog module, which creates multi-user blogs, one for each user and one aggregate blog. But many websites only need a single blog.
The "single blog" module re-creates some of the functionality of the blog module, but re-purposed for a single blog that uses Drupal’s default article content type.
This module was originally developed as an example module for Chapter 4 of the book, “Drupal 7 Module Development”, by Matt Butcher, Greg Dunlap, Matt Farina, Larry Garfield, Ken Rickard and John Albin Wilkins.
You can support the author by buying a copy of the book.