At the request of a certain commenter who posted a LONG time ago, I am listing the programs we have used this year. Enjoy

1- Stellarium ... Free Astronomy Program where you can watch the sky and stars and zoom in on celestial objects
2- Celestia ... Free Astronomy Program where you can fly around the solar system and beyond to watch objects like planets and asteroids move.
3- Zamzar.com .... Allows you to download youtube videos for free using the URL
4- Cartoon Physics - You all know this one! another freebee
5- Google Earth ... You can zoom in on any place on Earth and find topographical, cultural, and photographic information. Free but needs internet connection to store information
6- Seashore ... A program that lets you create and edit pictures
7- Mac Widgets and Google Gadgets... All kinds of cool applications like the earthquake watch and moon monitor.