Below are a couple of programs I wrote early in college as a way to practice what I was learning in class. Feel free to give them to whomever you like, as long as you distribute the complete zip file, as is. If you have any questions, comments, or suggestions about them, feel free to e-mail me.
Weight Version 2 - This was the very first one I wrote. It calculates how much a person should weigh based on the BMI formula. I just updated it based on new info I found on the proper BMI based on your age. You can download the current version here.
AnyDate Version 2 - This one was a little harder. It calculates what day of the week any given day was or will be. You can download it here.
Zemanim Calculator Version 15 - This one is my favorite and most useful. I created this program back in college but I've been enhancing it on and off since then. It calculates the Zemanim for any day of any year IN ANY CITY; all you need to know is the zip code, or the latitude/longitude. See the Manual.doc file (it's included in the zip file below) for more explanation. You can download it here.