Here is some fantasy stuff
This new skill provides characters with a rather remarkable set of options in combat. It's much more fun that "he misses, you miss, he misses, you hit, roll damage". Source: From Stone to Steel.
This class focuses on the more Earth-oriented master of dueling, sort of an advanced Fighter for those who like fencing. It's also about the only way to get the Fencing skill as a class skill. Source: From Stone to Steel.
New feats that are presented as bonus feats for the Duelist Prestige Class, but may be taken by any character that meets the prerequisites. Source: From Stone to Steel.
Trillith, Large Aberration
Trilliths are the creations of a psychic creature's nightmare.
A set of expanded alchemy rules I found hiding deep in the recesses of my hard drive, source and author unknown.