Languages
Language learning software is definitely helpful, and a lot of people have already improved their skills and vocabulary with such software. If that's what you have been looking for - take a look at applications from this category and download instantly.
VocabularyExpander
Hadith Viewer
VideoTrainear
Malayalam Indic Input 2
Lao UNICODE Keyboard
Wenlin
Dictionary Application
Magic Translator
TranslatorX
Toefl Speaking Practicing
Kurso de Esperanto
Arabic Text Reverser
KK Dictionary
Lingual Media Player
Chiitrans Lite
Multiicon E2H Character Converter
1Checker
Thai2English
Gerry's Vocabulary Teacher
Dewan Eja Pro
Zarnegar
Babylon-Enterprise
DDictionary
WordFile Creator Pro (Japanese)
Chat Translator for Skype
Bettergrades Higher English Workout
Discover FDM
Add-on support
You can get add-ons that download files/video from arbitrary websites.