ReadyTalk is a conferencing software designed for meetings, webinars, and webcasts. Prices range from $12 to $24/user/month, billed annually.
RingCentral is a VoIP phone system that allows users to make and receive calls through the internet. Pricing ranges from $39.99-$69.99+/user/month.
Highfive is a video conferencing software that lets businesses host online meetings. Monthly fees start at $9.99 per user when billed annually.