October - Visual and pseudonymous social network.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Objective Zero - Objective Zero Foundation uses mobile and web app technology to connect the military and veteran community to peer support, wellness, and mental health resources.
Anchor CMS - Free and lightweight blogging system
Boomsocial - Share photos and videos of events around you anonymously
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more