Magical Jelly Bean offers an Open Source dictionary that can be stored on a USB device. The portable dictionary does need to connect to a dictionary server to retrieve definitions from the database on the server. In order to use the portable dictionary, the user does need to have internet access. However, having the ability to access the definition for any word, no matter where you are, makes this portable application well worth the free price.
Magical Jelly Bean - Portable Dictionary - Screenshot
Authors Website: magicaljellybean.com
License: Open Source
Download: Get the magicaljellybean.com