Monstra
Monstra is another GPL, open-source, lightweight, flat-file CMS that is relatively new on the scene. The data is stored in XML files. Multiuser and SEO friendly, Monstra is flexible and secure. Installation takes only a few minutes. A great feature is frontend optimization built in. Minification and the combining of CSS and JS files make HTTP roundtrips minimal. Monstra is free of charge, although a donation is welcome.
Monstra is free and open source. Donations are welcome.
