You could have downloaded iShow X 1.0.1 for Mac from our application library for free. The actual developer of this free Mac application is NoThinGgOeS. IShow X for Mac relates to System Tools.
From the developer:
iShow X lets you quickly see hidden files & folders on your Mac.
Once installed iShow X appears as a menu item in the menu bar for easy usability.
You may want to check out more software for Mac, such as iShowU, iShowU HD or iShowU Studio, which might be related to iShow X.