Bumped into this file compare utility:
P4Merge lets you visualize the differences between file versions. Color coding makes it easy to resolve conflicts that result from parallel or concurrent development.
Visual Merge and Diff Tools
A shell script that makes it easy to use Objective-C files for shell script-like tasks – Ilja Iwas
The “Friendly” Python Imaging Library adds image processing capabilities to your Python interpreter – Pillow
…easily run many of the system level Unix shell scripts that perform maintenance routines as well as clearing many of the cache files used by OS X – @yasuapp