As a freelancer, I found that I needed a simple place where my clients could go to get important documents like assets, contracts, invoices, etc.
I quickly put together a simple page that I could send out to my clients. After the initial success, I started thinking that this is something other freelancers could use as well.
I took some time over the next couple of weeks to make it something that I could open up to other people to use.
I don't know if this is a tool that is going to see much adoption, but I still have plans to make improvements for my own freelance business!