Azure is Microsoft's cloud platform that provides many useful tools and services to help you build, deploy, and manage applications. Among them is a tool for converting text to speech, which can build applications and services that can speak naturally. It uses custom, lifelike speech generators to produce different speech styles and emotional tones. You can set the voice to male or female and even adjust the pitch and speed of the speech. After registering, you can use Azure's free resources and applications.