This was my first program ever and it is not very useful unless you attend college and study in sciences and even there, you might find some things are faster. I made this to learn C++ and believe me I know the basics after 3800 lines of repetitive code.
This is a periodic table of the elements in a console program with cute little colors. I can post the source if you want it.
You can type commands such as:
H
Hyrdogen
1
table (cute ASCII periodic table)
tendency
info
constants
alka (alkalines)
all
etc.
http://img403.imageshack.us/img403/5822/ucoe3ov1.png
EDIT: Oh yeah and I never finished it. Elements from carbon and plus have less info.