Text2VoiceOver is described as 'A web app that let you create voiceovers for your videos. Upload a video or use a youtube video link and add a voiceover to it !'. There are more than 10 alternatives to Text2VoiceOver for a variety of platforms, including Windows, Online / Web-based, Mac, iPhone and iPad. The best alternative is Read Aloud, which is both free and Open Source. Other great apps like Text2VoiceOver are eSpeak (Free, Open Source), TextAloud (Paid), Read Aloud (Free) and NaturalReader (Free Personal).
ReadAloud is a very powerful text-to-speech app which can read aloud web pages, news, documents, e-books or your own custom contents. ReadAloud can help with your busy life by reading aloud your articles while you continue with your other tasks.
Central Access Reader (CAR) is a free, open source, text-to-speech application, which reads docx files and pasted text using the voices installed on your computer. It currently works only on 64-bit Windows.
Voice Dream Reader lets you listen to any document and ebook using text-to-speech. Text-to-Speech - One premium Acapela voice of your choice free with the purchase of the app. - 36 built-in iOS voices in 27 languages are also available for free.