About FmPro Script Diff
Compares, edits, searches and stores FileMaker ScriptMaker scripts - outside the FileMaker database. Changed scripts are compared on a line-by-line basis and displayed with color coded tags to the left of each modified line. Interline changes are also highlighted to indicate Changed, Added or Deleted text. Each script’s XML source can be manually edited or updated via the Search & Replace feature, and pasted back into FileMaker Pro/Advanced.

Transferring scripts between FileMaker Pro and FmPro Script Diff is done by copying & pasting the scripts via the clipboard. No DDR Export is required. Selected scripts can then be copied back onto the clipboard as XML for pasting back into FileMaker or as RTF formatted text for project documentation. Many more features.

Read more: http://www.apple.com/downloads/macosx/development_tools/fmproscriptdiff.html