WordPress is an open source content management solution based on PHP maintained by Automattic which is also being offered as hosted solution.

StumbleUpon is a discovery engine that finds and recommends web content to its users.

Bloglovin is a platform that allows users to read, organize, and discover their favorite blogs on mobile and desktop.

Badoo is a dating-focused social network.

Voog is a mess-free platform that enables you to build awesome websites with a creative flow.

Tumblr is a microblogging and social networking website.

Blogger is a blog-publishing service that allows multi-user blogs with time-stamped entries.

Medium is an online publishing platform.

Write.as is a focused publishing platform.