Serendipity is a Weblog application implemented in PHP which can power individual weblogs, be they diaries, personal homepages, or other types of blogs. It ships with a variety of plug-and-play plugins, and more community created plugins are available.
Serendipity is written for PHP version 4 using the Smarty PHP templating engine, it is intended to be PHP5 compatible as well.
Serendipity was started in 2002 by Jannis Hermanns, however today active development is done by Garvin Hicking.
DasBlog is an ASP.NET weblogging application. It runs on Microsoft .Net 1.1 and is developed in C#.
DasBlog, an evolution of the BlogX weblog engine, adds lots of additional features like:
There are many other goodies from the BlogX codebase. And it’s free without restrictions.