Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Buzzsprout - Buzzsprout is a leading Podcast platform that allows you to enjoy, host, promote and track your own podcast.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Podbean - A better way to discover and play all your favorite podcasts anywhere, anytime.
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
SoundCloud - Enjoy music & follow favourite artists