Ahmet Alp Balkan created the Java version of my Python implementation of turkish-deasciifier (originally by Deniz Yüret in Emacs Lisp). The source code as well as the .jar file is available at http://code.google.com/p/turkish-deasciifier/. You can read his blog entry here.
For web based version visit http://turkceyap.appspot.com/
To install Firefox add-on visit https://addons.mozilla.org/en-US/firefox/addon/204311/
Ton install Chrome extension visit https://chrome.google.com/extensions/detail/nhfdmlgglfmcdheoabgklabmgjklgofk
For related news visit http://ileriseviye.org/blog/?tag=turkish-deasciifier.