SmartLine from GoDaddy VS Listen

OpenPhone - Simplest way to own a business phone number

Ring4 - Manage business phone line as easily as you manage emails, in the cloud. Ring4 provide you with a business line and video conferencing solution.

Burner - Disposable phone numbers -- now with MMS photo support

TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.

SpotMenu - Spotify and iTunes in your macOS menu bar

Sideline - Sideline™ is the free 2nd number for your smartphone. It uses your existing carrier network so your 2nd number works anywhere your cell phone does.