ttsMP3.com - ttsMP3.com is a web application that can convert your texts into audio MP3 audio files and vice versa.
Crowdin - Localize your product in a seamless way
VoiceMaker - Voicemaker is a web application with which you can convert your texts into audio by simply importing the text onto the dedicated text box.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
NaturalReader - Main Feature: Full Common Functions: Read Text Files o Text files o MS Word files
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.