Gunther aims at a different target-market than most existing content management systems. Gunther is for those who want an instantly accessible tool to build small to medium sized websites and may want to provide others (clients, customers or friends) with an easily editable website. Gunther strives to provide the user with genuinely useful features such as automatic thumbnail generation for uploaded images, customisable page templates, automatic generation of image galleries and an easy-to-learn wiki-style markup language to format pages. Gunther can also be deployed with zero configuration and comes with a clean, elegant, functional default page template so a Gunther driven site will look great from the word go.
Not too shabby job here. Looks like they also have some nice Mac software.