Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.

Clover Sites - Clover Sites is a powerful, intuitive, and affordable content management system and website builder that enables you to create your online presence within no time.

Anchor CMS - Free and lightweight blogging system

Rocketspark - Rocketspark is an online website builder that allows you to have a website in just minutes that is fully optimized for search engines.

Textpattern - Textpattern is an elegant content management system that is free, open source software.

BoldGrid - BoldGrid is a platform that lets you create websites by using its proprietary builder.