The early EU with novels like the Han Solo Trilogy and the Lando Calrissian Trilogy come to mind. It would be cool to see a fan made version of Splinter of the Mind's Eye. From what I understand it was based on a low budget sequel idea that George Lucas had for what would eventually become The Empire Strikes Back. He figured that the first film would barely make it's money back and he drafted a treatment for the sequel that took place on a swampy planet with mostly fog which would be more affordable to shoot given that he assumed the budget would be far less than the first film. By having the setting in such an environment it would require much less money in set construction. Brilliant idea actually.