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HoudahGPS is a front end to the open source command line tool GPSBabel.

GUI for the command line look tool.

GUI for VMWare Fusion command line tools.

rawr! is based on rarlab's os x command line utility

Gnuplot is a portable command-line driven interactive data and function utility.

On-line reference software for quick info on any word or phrase on your screen.

Fully-featured LaTeX editor.

AppleScript replacement for mail merge feature.

Generate documentation from source code.

View the tail end of text files.