FuzzyInput

Prefix tree style fuzzy spell checker including auto-complete and auto-correction

Insertion and Deletion Tolerance

> neccesary
necessary

Auto-Complete

> mot
mother

Keyboard Vicinity (Gesture)

> moyjer
mother

Credit

Source of frequent word list: http://www.insightin.com/esl/

Web Demo

I've built a web page to demo FuzzyInput, you can visit it here.