TextNow
Description: TextNow is a free texting and calling app and service. It provides a free phone number to send SMS messages and make phone calls over Wi-Fi. The basic service is ad-supported, but premium options without ads are available.
Type: software
Yate - Yet Another Telephony Engine
Description: Yate is an open-source telephony engine and server for VoIP and legacy telephone infrastructure. It supports multiple protocols and interfaces for building communications solutions.
Type: software
Pricing: Open Source