You could have downloaded iMessage2Skype 1.0 for Mac from our application library for free. The software is categorized as Communication Tools. Commonly, this application's installer has the following filename: imessage2skype.dmg.
The latest version of iMessage2Skype is supported on Mac OS X 10.8 or later. This free Mac app was originally developed by Mirko Bethmann. The most popular version among iMessage2Skype for Mac users is 1.0. The program is sometimes referred to as "iMessageToSkype".
From the developer:
iMessage2Skype is an application that allows you to forward iMessages to your Skype account. You have to set up a second account for Skype and login with this on the machine you are dedicating to message forwarding. Also, you can remotely activate and deactivate the forwarding, just by replying "SET ON" or "SET OFF" or get the forwarding status by sending "STATUS".
You may want to check out more software for Mac, such as Zimbra Toaster, PageSender or Mail to ToDo X, which might be similar to iMessage2Skype.