It might be something to notify you when data/images are automatically stored in areas like %APPDATA%.
Or, perhaps it'd be anti-malware directly targeting stegonagraphy, and to scan downloaded images of which could possibly contain hidden scripts made with malicious intentions.
If I had the time, I'd combine those two ideas.
For me, if your position is a freelancer is quite easy because you can ask a client for their requirements or design perspective, and if you are really know about web development, you can use a bunch of templates, on the internet, change it a little bit and just make it specific to the client requirements. That's doesn't take much time to do
well, the only thing i can think of is a simple web application, like a calculator, todo list, calendar, or a timer. or you can make a web template for a portfolio website, that would be easy and quick, too