Download of AppHack 1.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The most popular version of the tool is 1.1. This free Mac application is a product of Sveinbjorn Thordarson. The application lies within Theming Tools, more precisely Icons & cursors.
From the developer:
AppHack is a powerful developer and theming tool to alter, replace or extract the property lists or icons of Mac OS X application bundle packages.
You may want to check out more Mac applications, such as particleView, Startrail or Menu Eclipse, which might be similar to AppHack.