Back in 2008 I released the first version of a simple text-to-speech program for Windows called RoboBlather. Over the years it has enjoyed some popularity among a small niche of users due primarily to its uncomplicated interface.
Today I finished open-sourcing it under the MIT license. If you’re interested, it’s available here on GitHub.
You don’t have to be a programmer to enjoy it — there’s an installer that lets you use it right away without needing to worry about the programmer-y aspects.