Mikogo is a free screen sharing solution with built-in VoIP for online meetings, web presentations, web conferencing and sales demos. 

RTChub Platform allows you to easily connect and chat with your customers or clients with a simple one click interface integrated into your WebSite 

Richcall is a video chat software that improves customer experience with co-browsing, text chat, and file sharing. It helps companies improve sales via face-to-face communication and product demonstration. 

Business Hangouts is a platform that delivers webinars, live streaming, and content sharing solutions for Enterprises (large and small), Schools and Universities, Government agencies, Marketers, Non-profits, and Religious organizations 

8x8 Video Meetings is simple to use and offers limitless flexibility