uberflip - Organize and Centralize ALL of your Content in minutes
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
CoSchedule - CoSchedule is the #1 marketing calendar that helps you stay organized and get sh*t done. Plan, produce, publish and promote your content.
Anchor CMS - Free and lightweight blogging system
Embedly - Embedly helps publishers and consumers manage embed codes from websites and APIs.
Textpattern - Textpattern is an elegant content management system that is free, open source software.