Java based software ideas for college project
<p>I want some Ideas for what kind of java based software should i make so that i get good grades in college as well as i can earn some money by selling it.</p>

<p>I am good at Java but not any expert.
I have around 15days time. 
And Should i make the code open source.
I am good at Java SE.
I have made some softwares like library management, school management, inventory management and all such types of softwares in past but these are all very common college projects and i cannot earn form those because there are very good quality freewares available.</p>
