2. MICROSOFT VISIO - Dia can to some extent be an alternative to visio, just that you might have to save/export the page as an image for you to insert/import into another application like the openoffice.org writer, Kwrite etc.
3. MICROSOFT WORDPAD - Kwrite is a very good alternative and it comes pre-installed on most kde linux version.
4. MICROSOFT NOTEPAD - Gedit, Kedit and Kate are better alternatives to notepad, they allow you to save as a any file format you desire without putting a " " quote. This makes them easily used as a programmer's notepad.
5. INTERNET EXPLORER - There is Opera, Firefox and Konqueror which work just as well or even better that the latest Internet Explorer.
6. WINDOWS MEDIA PLAYER - VLC player is a very perfect and better alternative and can play nearly all known popular music and video format. There is also Amarok and Kaffeine.
7. ADOBE ACROBAT READER - There are Okular, Xpdf and linux version of acrobat reader.
8. NERO BURNER - There are k3b and brasero on Linux. K3b has been the most reliable burner I have ever used, especially for burning images.
9. HYPERTERMINAL - CuteCom and Minicom work just as well.