Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

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.

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

Whereby (formerly appear.in) - Collaborate from anywhere - video meetings with no downloads

HelpScout - Help Scout is a simple, straightforward way to provide excellent support

Mornin - An anonymous audio conferencing service