Please email me others you may find to add to this list; they must be able to be used online (i.e. without any app downloading or installation or personal info requirements).
Oddcast [audiovisual] or here Vocalware [audio only]
Text2VoiceOver [Chrome only]
Google [multi-language, multi=engine] (scroll down and replace the text that appears under "Text to speak" with your own text
ModelTalker (downloads a .wav file)
While there are many downloadable tools one could install to do TTS, for this class homework, we can only accept TTS systems that can be used online (i.e. without any app downloading or installation requirements).