Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
Video SDK from Zoom - Build fully customizable video-based apps
FileFlex - FileFlex: Access Share Stream developed and published by Qnext.
Amazon Chime - Online meetings and video conferencing
Airtime - Hang out with group video, share music & videos
AuthKey.io - SMS API and WhatsApp Business API