Program: Wine (Wine Is Not an Windows Emulator)
Site: http://www.winehq.org/
Description: It allows that Windows Apps run on Linux (It works as a compatibility lawyer)
License: GNU Lesser General Public License (http://www.winehq.org/site/license) (Freeware and OpenSource)
Other:
I have a new amazing idea, but first I will explain how it works:
Wine is a compatibility lawyer between the OS (Linux or Mac) and the Apps for Windows.
It also creates a folder that is the virtual hard drive for the Windows Apps.
Now my idea:
Porting Wine to windows would allow installing programs locally on the pen, plus, it would no more need Wine to be installed on Linux for running PAM and PA Apps; becoming really portable.