The vast of amount of data being stored in this day and age, naturally leads to files sitting unused for longer and longer periods of time. A new app, agedu, can quickly tell you what data on your filesystem is lying fallow.
In the past, the only way to have Windows and Linux coexist on a single computer was to dual boot your system. This forced you to log out and reboot every time you wanted to switch between the operating systems. Creating a Virtual Machine allows the two to coexist happily on the same laptop.