I have multiple accounts, and multiple devices sharing applications. To follow up the other responses, your App Store account can be separate from your iCloud, Messages, and FaceTime accounts. I use a separate account (Apple ID) for iTunes purchases than my iCloud account.
Running .EXE Files With WineHQ. From your Ubuntu command line type $ wine application.exe where application is replaced by the name of your .EXE file. This method will only work if your file is located in a path location. WineHQ gives these examples: Path=c:\windows;c:\windows\system;e:\;e:\test;f:\..
File Type: Mac OS X Application Plug-in. Bundle file or plug-in that adds extra features to the operating system or an application in Mac OS X; examples include support for audio and video cards, custom printer filters, extensions for Dreamweaver, and additional effects in iMovie.