BlazeBlogger - BlazeBlogger is a simple to use but capable CMS for the command line.
Bludit - Bludit is a web application to build your own website or blog in seconds, it's completely free and open source. Markdown support.
Noosfero - Noosfero is a web platform for social networks with blog, e-Porfolios, RSS, thematic discussion and...
WonderCMS - WonderCMS is the smallest flat file CMS. Completely free, open source, privacy oriented for over 12 years.
Indexhibit - Indexhibit is a portfolio cms for everybody.
Grav - The modern open source flat-file CMS