I encounter so often a neat color on a website or desktop application and want to grab that color for use in my own graphics and applications.

As a color-deficient individual I find this program to have a peculiar usefulness. When I come across a neat color and want to figure out exactly what color it is (ie. via HTML Hexidecimal or some other like manner) I use this free little application. Just Color Picker will allow you to zero in on a pixel and copy the color code equivalent to your clipboard. It's a very handy little tool.

This program is basically a Mac alternative to the very helpful Windows program: Sequoia View. Both programs are used to display the sizes and types of files on a storage device in a graphical way called "treemaps". Specifically, using the language of Sequoia View, both apps display files and folders using "squarified treemaps". When you're concerned with unnecessary files consuming a lot of your hard disk space, these apps become invaluable to disk cleanup.