Audio Lesson Studio - Link - "Allows you to create simple, user-defined, .mp3 audio lessons that may be used as an aid for learning languages or just about anything else - use your imagination! Audio can be based on existing media or automatically generated using Text-To-Speech."
Capture2Text - Japanese OCR Utility - Link - "A utility that allows you to quickly capture a small portion of the screen, OCR it and (by default) save the result to the clipboard."
cb's Japanese Word Frequency List Generator - Link - "A utility for generating word frequency lists from files that contains Japanese text."
and more
WikiPOS is a natural language processing tool, where POS tagging is done in the context of computational linguistics. It is able to recognize parts of speech and tag them correspondingly. Current version support English language only.
Dexway provides the market's most complete language learning technology, featuring loads of interactivity, professor for tutelage via virtual classes, continuous monitoring of student performance and speech recognition technology for the evaluation of pronunciation
There are a couple of other companies doing audio search indexing, one from Germany the name of which escapes me now. I see an application in this for languages.