For conversion of text into audio or here aloud there is alot of software. But NextUp TextALoud is best of them. Natural alike audio generation. I think they are the best. You can read aloud your any content it could be any website content, email, Or you could save into audio file for future use. You can also can carry to your mobile by downloading into your mobile phone.
Download from official website: NextUp TextAloud 4.0.30