Gwaber - Gwaber is an easy platform that connect between remote job seekers and remote companies in one place.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Roob. - Ask your candidates for video resumes, instead of CVs
Anchor CMS - Free and lightweight blogging system
AVDA - AVDA is an app that matches job seekers and companies.
Textpattern - Textpattern is an elegant content management system that is free, open source software.