A)
A simple financial options trader for hot ideas.AKA - trading weekly options on Netflix, or facebook. $ could also be pooled so smaller than 1 option positions could be taken.
I know a lot about finance and could help you make this tool.<p>B) 
An email sorting tool. Assigning importance scores to emails and then having the email predict where you want incoming emails to be in your list (higher scores = near the top)<p>C) 
A tool for entering your course list, and having the page find all of the cheapest markets to buy your books from. Then transacting the total deal from one webpage.<p>Message me if you want me to discuss further any of these ideas. These are rather simple ideas that could make a good side project. If we actually get something done, I have much bigger projects.