Emphatic by Connect365 - Custom social media marketing on automation
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Buffer for Instagram - Plan, track, and analyze your Instagram marketing
Anchor CMS - Free and lightweight blogging system
CORA for iOS - Manage your social media automatically
Textpattern - Textpattern is an elegant content management system that is free, open source software.