Originally Posted by Raticus
It is my understanding that the possibilities of running windows applications has improved to about 95%.
Be aware that running native apps is usually better for performance and stability than emulated ones (especially if it requires specific operating system features, like DirectX), not to mention you may be using new software soon that isn't supported under the emulator.
When submitting your analysis i would include some native Linux apps to compare to the windows ones you require. Also a test box running these apps gives a good visual reference for your employers.
If you state what Software you require, we could suggest alternatives (or search the forums, its full of that sort of thing).
Wine is the only 'emulator' i know off (stands for Wine Is Not an Emulator though)- http://www.winehq.com/
It supports a fair few apps, or there is cross over office as well - http://www.codeweavers.com/