Dead Simple Screen Sharing - Simple screen sharing and audio conferencing software.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Demodesk - Collaborative screen sharing for sales & success teams
Anchor CMS - Free and lightweight blogging system
Witeboard - A real-time whiteboard for your team. No signups required.
Textpattern - Textpattern is an elegant content management system that is free, open source software.