GoToWebinar - Webinar & Online Conference | GoToWebinar
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Anchor CMS - Free and lightweight blogging system
WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing
Textpattern - Textpattern is an elegant content management system that is free, open source software.