I've added a new template editor to the Cocoa version of ResKnife. Along with the Hex Editor, the new "export data to file" feature and the new-and-improved plugin-editor protocol, this should make ResKnife a useful addition for MacOS X users.
I have committed the latest code, which adds a preliminary hexadecimal editor to the Cocoa version. There are hundreds of minor changes to the Classic, Carbon and Cocoa host programs too.
Click on the CVS button above to download last night's tarball, or go to http://resknife.sourceforge.net/ to find out how to check out the latest code.