Favourite computer programs:

Free programs:

C.a.R.(Compass and Ruler)
Graph
WampServer (Apache, PHP, MySQL)
HeidiSQL
HandyFile Find and Repalce
Notepad++
TeXstudio
Foxit Reader
PDF reDirect
IrfanVeiw
FileZilla
WinHTTrack Website Copier
NaturalReader
Lingoes
GeoGebra

Paid programs:

Maple
NATATA e-book Compiler