Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Tidze - All-in-one ticketing and live streaming
Anchor CMS - Free and lightweight blogging system
GiveCentral Live - GiveCentral Live is an online web streaming solution that allows you to live-stream your charity events, galas, and other fundraising activities to your supporters.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Flutin - Flutin is an online live streaming platform through which you can easily multistream on 40+ platforms.