텍스트 비교 구현 관련

Javascript Diff Algorithm
홈 http://ejohn.org/projects/javascript-diff-algorithm/
테스트 http://www.daftlogic.com/sandbox-javascript-compare-differences-between-strings.htm 

DiffButty (Javascript)
홈 http://www.baconbutty.com/blog-entry.php?id=45 
소스 http://www.baconbutty.com/blog-attachments/045-DiffButty1.js 
테스트 http://www.baconbutty.com/blog-attachments/045-DiffButty1-test.htm 

Javascript Diff Lib
https://github.com/cemerick/jsdifflib#diff-js 

PHP FineDiff
소스 https://github.com/gorhill/PHP-FineDiff
테스트 http://www.raymondhill.net/finediff/viewdiff-ex.php

PEAR text-diff
http://pear.php.net/manual/en/package.text.text-diff.usage-examples.shell.php

PHP Simple Diff
https://github.com/paulgb/simplediff/blob/master/simplediff.php

PHP pure-Diff
http://www.holomind.de/phpnet/diff2.php

google-diff-match-patch (C, C++, 파이썬, JS, JAVA, ObjectiveC ... 지원)
홈 http://code.google.com/p/google-diff-match-patch/
API http://code.google.com/p/google-diff-match-patch/wiki/API 

Pretty Diff (Javascript)
홈 http://prettydiff.com/
소스 https://github.com/austincheney/Pretty-Diff