Google G Suite
Use shared calendars to see when others are available and schedule meetings with automatic email invites. With one click, turn your meeting into a video conference from any camera-enabled computer, phone, or tablet. Share your screen to review your work as a team, and make decisions on the spot.
Stay more connected and productive with a clear, unified view of your email, calendar, contacts, and files. Go beyond the basic email tasks to get more done wherever you are with Outlook on your iPad®, iPhone®, Android™ tablet and Android™ phone.
Zoho Mail has brought the best elements of social into email, letting you tag people or share folders in a click. Streams will let you get social, and help you spend more time outside the (in)box.