Shuriken

This has become a popular but niche weapon due to its usability for all Drow and Monks.

The Shuriken Expertise feat gives a chance for an additional throw (as long as offhand weapon is not a shield) enhancing its appeal.

Returning vs. Non-Returning
The Non-Returning variety is readily available from chests, vendor shops, and the auctionhouse but cannot carry modifiers or be crafted.

The Returning variety, however, is quite rare with very few named item options such as the Snowstar, Shadow Star, and The Morning Star.

Greensteel and Alchemical varieties are also available.