There are a variety of open source blogging software options available, but some of the most popular include WordPress, Medium, and nginx. Each has its own strengths and weaknesses, but all are relatively easy to set up and use.
WordPress is the most popular open source blogging platform and is available on a variety of platforms, including Windows, Mac, and Linux. It is also one of the easiest platforms to use and can be configured to look pretty much any way you want it to.
Medium is a newer option that has become popular in recent years because of its simplicity and approachability. It is built on WordPress technology but can be configured in a number of different ways, making it perfect for creating custom blogs or sites.
Nginx is another popular open source platform that can be used to create blogs and other types of websites. It is fast and reliable and can be configured in a number of different ways to fit your specific needs.