Virtual Phone Systems
Every business needs a way for customers to reach them. Providing a phone number on your contact page does quite a bit to build social proof, and all the solutions below make it easy to redirect the call to multiple devices or setup menus.
Google Voice offers a handful of the most essential voice calling features. It even integrates directly into your inbox so you can make a call from anywhere. The Google Voice mobile app and One Number feature are only available to US based users.
Burner is a disposable number app. You can manage multiple numbers and destroy them when you are done. Works for incoming calls, texts and voicemail.
Grasshopper is a service that specifically handles creating virtual phone systems for entrepreneurs and small companies. They allow you to setup a permanent number, forward the call to multiple devices and have a menu for different extensions or people.
Skype enables voice and video calls from any device. They also have single number features so you can receive and make calls from anywhere.