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.

Zoji - As claimed by the developers of this Zoji, it caters online tools to aid you plan activities off-line.

WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing

Whoozin.com - Free RSVP Online | Track RSVP’s and Sell Tickets for your events and recurring meetings.

GoToMeeting - GoToMeeting is a web conferencing service offering a range of services which are available on Mac, PC, iOS and Android devices.

Manvite - As the name of this service suggests, the users can avail easily and simply invite rather than online summons that are blessed with flowery fonts and dabbling champagne glasses.