With Crescent Empire coming out, that puts us at a total of 6 sourcebooks (so far) with Advantages, Backgrounds, National Traits, Sorceries, etc spread throughout all of them. So, here's a few handy dandy indexes to help you find what you're looking for; I plan on updating these as new sourcebooks are released.
They're PWYW, so download them for free (although tips are always welcome.)
- Hero Creation Index: http://www.drivethrurpg.com/product/217012/7th-Sea-Hero-Creation-Index
- Ship Creation Index: http://www.drivethrurpg.com/product/216899/7th-Sea-Ship-Creation-Index
I ran through several editing passes, but it's possible that there are a few erros. If you find any, please let me know, and I will correct them. Any other feedback is also welcome!