DSpeech is a TTS (Text To Speech) program with ASR (Automatic Speech Recognition) functionality integrated. 0.57 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XPFree
ClipSpeak is a portable, simple, easy to use, free application that reads out any text you select and copy to the clipboard. 1.5 MB | For Windows 7, Windows 8 / Vista / XPFree ClipSpeak Review - TTS Program Download
Balabolka is a feature-rich portable freeware text-to-speech application developed by Russian developer Ilya Morozov. 6.86 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XPFree Balabolka Review - TTS Program Download
IVOS (Intelligent Voice Operating System) is an intelligent agent that offers both Speech Recognition and Text-to-Speech capabilities, allowing you to run your computer via voice commands. 2.7 MB | For Windows 7 / Vista / XP / 2000 / MEShareware
Concrete Voice is a simple, portable text to speech application with a friendly interface. 1.5 MB | For Windows 7, Windows 8 / Vista / XPFree Concrete Voice Review - TTS Program Download
I hadn't heard of software for converting your text documents directly to mp3 files before I came across 2nd Speech Center. 3.78 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XPShareware Speech Center Review - TTS Program Download
TextAloud is probably one of the most popular shareware text-to-speech programs today. 14.13 MB | For Windows 7, Windows 8 / Vista / XPShareware TextAloud Review - TTS Program Download
An addon program to Microsoft Voices: Bring your Desktop to Life with Microsoft Agent Animated Talking Characters in 11 Languages! 6.53 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XPShareware