Dictionary: should be easily replaceable with GoldenDict
Printer: hopefully, they have a Linux driver?
Dia, Flac: fine?
Media player: have to switch to VLC Player?
Google Earth: not used for a long time, switch to Marble?
MathML Weaver: what is it?
Kaplan: not needed?
Home-brewed Visual-Studio-Compiled programs: re-compile for Linux, with curses at Visual Studio all the way?
Nokia, XVid: fine?
Seagate: what is it?
Bluetooth, WiFi, Ethernet drivers: please, be fine!
DjView: something has to be on Linux for this file format
AHDW: run under Wine?
Skype: fine, though I would rather find an alternative
Now... What would be the way to gradually switch from Windows to Linux?