Microsoft Dictate is an Office add-in for Windows Outlook, Word and PowerPoint that converts speech to text using the state-of-the-art speech recognition behind Cortana and Microsoft Translator. It is a freeware text-to-speech application.
Here is a screenshot to illustrate the features and user interface of this application:
Balabolka
DSpeech
NVDA
NVDA Portable
Panopreter Basic