You do have WINE for those few applications that you can not break from (it is not perfect but always worth having a go with it)
WBFS (if indeed you are still using it- most people are moving away from it all these days) is available- initial linux offered the superior WBFS experience* courtesy of a FUSE WBFS module-
http://gbatemp.net/index.php?showtopic=146731 (FUSE stands for filesystem in user space- it appears like it would if you plugged in a regular USB drive).
If you want something a bit more traditional or do not fancy introducing such things into your install then
http://gbatemp.net/index.php?showtopic=147032 should cover you.
As for more traditional applications we are probably in the wrong section but that depends (do note now you are on linux links become increasingly irrelevant compared to windows for programs as most distributions will have some form or repository from which you can grab files and indeed most of the time people suggest using them). The big two for most people are a browser and some office software.
firefox (and the vast majority of plugins) are available for linux
openoffice is equally available (and you also have abiword, and koffice if you want instead and many other programs to this end).
After this many common formats from windows based programs have programs that can at least read them in linux- accounting software often being the stickler here.
You can easily search a repository for programs (they do work quite well) but if you want specifics say so and I am sure we can see to sorting something out.
*I assure you I will punish myself rather harshly for use of such language.