Speedible 1.0.5 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Speedible for Mac belongs to Audio & Video Tools. The actual developer of this Mac application is Miavy Systems. We recommend checking the downloaded files with any free antivirus.
From the developer:
Speedible allows you to control the playback speed of your audio files while maintaining its pitch, so that playback still sounds normal at every speed. With audio recordings, you generally cannot ask a narrator to slow down or speed up, but with Speedible you can do just that, and listen at the pace best suited to you.
You may want to check out more Mac applications, such as Stomp, OSCulator or Xilisoft Video Converter Platinum, which might be related to Speedible.