Any tool or website to find visuals of existing software development projects?

Hey guys,

I'm currently looking for a tool or a website that has some kind of pictures or templates of any software development projects. It could be ecommerce platforms, ERP, any management software, really anything.

In my business, we do budgetary quotes for clients on some software projects, but we don't always want to provide a detailed model of what their software/website is going to look like. Instead we sometimes like to use images of what exist and show client just to give them an example of what they can expect.

Is there some sort of shuttlestock, but only for software projects, interfaces, platforms, etc.?