For ios mac osx lion or mountain lion and latest xcode
For wp8 windows 8, and if you want to use the simulator:
In the BIOS, the following features must be supported:
Hardware-assisted virtualization.
Second Level Address Translation (SLAT).
Hardware-based Data Execution Prevention (DEP).
4 GB or more of RAM.
64-bit version of Windows 8 Pro edition or higher.
For android most computers where you can use eclipse