Magma Conduits
FaceDeer

Removes default mapgen lava and adds widely-spaced vertical lava "veins".

Commodity market
FaceDeer

Provides API support for various in-world commodity markets

Named Waypoints
FaceDeer

A library for managing waypoints shown in player HUDs that can be discovered by exploration.

Name Generator
FaceDeer

A lua library for generating random names based off of rulesets and syllable lists.