Reference
It's one thing to have an encyclopedia and quite another to have software that combines a couple of those. Such software usually gives you more options and better and easier search engine. Check out this software category, read reviews on these education applications, take a pick, and download instantly.
SA Dictionary
WordWeb
kamus
Shipra's Dictionary
Merriam-Webster
SmartBee
Wordinn English to Urdu Dictionary
AlbionXP
MADHURA Dictionary
ABBYY Lingvo Multilingual Edition
TypeText
Fora Reader
AnyMem
SlovoEd Deluxe English-Russian
Lector
Salts & Solubility
Grammar Slammer
LeoMoon Persian TTT
Balloons & Buoyancy
KanjiBrowze
Declan's Japanese Dictionary
As-U-Read
IndoDic E-Kamus
555 Timer
Guitar Power
WXTide32
Classware
SlovoEd Classic German-Russian
Discover FDM
Add-on support
You can get add-ons that download files/video from arbitrary websites.