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

Live Center - Live Center helps news and media companies cover events and breaking news in live feeds. Create Live Blogs with engaging content, interact with your audience, and customize feeds to strengthen your brand.

Anchor CMS - Free and lightweight blogging system

Medium - Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.

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

Tumblr - A feature rich and free blog hosting platform offering professional and fully customizable templates, bookmarklets, photos, mobile apps, and social network integration.