Download of SpeakLine 5.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program belongs to Audio & Video Tools. The actual developer of this free software for Mac is FingerCoding UG. We recommend checking the downloaded files with any free antivirus.
From the developer:
SpeakLine lets your Mac talk to you. To ensure that your text is recited properly, you can choose between different tones. Change the language with a few simple clicks as well (Since OS X Lion those options are provided internationally by Apple).
Depending on the situation, you might want to change the reading speed to fully comprehend or evaluate the given text.
You may want to check out more Mac applications, such as 4Media Video Converter Ultimate, Screenflick or iSubtitle, which might be related to SpeakLine.