Education

Astronomy

• Celestia Portable - portable space simulator
• Stellarium Portable - portable planetarium

Dictionaries

• GoldenDict Portable - dictionary and encyclopedia lookups

Geography

• Marble Portable - virtual globe and atlas

Genealogy

• Gramps Portable - genealogical research software

Memorization

• Mnemosyne Portable - flashcard memorization tool

Religion

• BPBible Portable - bible study tool

Technical Computing

• FreeMat Portable - scientific prototyping and technical computing

Typing

• TIPP10 Portable - touch typing tutor
• TypeFaster Portable - touch typing tutor