This topic started on the Advanced Forum but because of its general nature, I decided to post here in case others are interested.
This is not a recommendation. It is just a brief report of my findings.
TTS is of particular interest to me, so following Richard Walter's suggestion I tried Sayzme. I could not install it because one of the required MS files would not install on my system (Win 2K Pro SP4). I decided to research in more depth. After downloading and trying several packages, I settled on Text Aloud from NextUp Technologies
http://www.nextup.com/TextAloud/. I downloaded the trial version and then ordered the Pro version.
It works from within most of my text applications (MS Word, WordPerfect, PDF, HTML and RTF files, and for Opus, any text copied to the clipboard is converted to WAV, MP3 and WMF.
The free voices provided with TextAloud are average in that they sound like they are computer-generated, but they are acceptable to me -- just. However, TextAbout is compatible with AT&T's Natural Voice Technology and others. AT&T produces "voices" that I find more acceptable. These voices are available in a variety of styles (male and female) in US English, UK English, Indian Accent English, Latin American Spanish, German and French. I irdered a male UK English voice, and after it arrives (2+ weeks) I'll report back if anyone is interested.
TextAloud Pro costs US$29-95. AT&T voices cost US$35 each.