ttsMP3.com - ttsMP3.com is a web application that can convert your texts into audio MP3 audio files and vice versa.
DistroKid - Unlimited uploads to iTunes and more. Keep 80-100% of your royalties.
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.
TuneCore - Music distribution platform for artists to sell their content worldwide
Notevibes - Online Text to Speech Converter with 57 natural voices. Download your files as mp3 and Wav. For business and personal usage.
LANDR - LANDR is online music software for creators: music mastering, digital music distribution, free sample packs, collaboration tools, music promotion, and more. Try it free.