Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
SoundCloud Go - Your favorite music and new discoveries, offline and ad-free
Anchor CMS - Free and lightweight blogging system
Audiomack - The free SoundCloud alternative
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Jukebox - Collaborative music player