I had created a campaign for Star Craft Brood War, I did when I was not as experienced yet... well you can download it here:
PROTOSS secret levels Campaign

It might not be as good as maps created by pro people, but, well...
Besides of that... well, I have a compilation of other stuff like a bunch of cursors like the one used in this page:
SC1 Cursors

Some of them were made by myself. Others were found by me, but I don't remember where, if you're the creator please email me.