In the Light of a Ghost Star is an ultralight ruleset that includes a mini campaign setting, sample hexcrawl, and sample dungeon. It's written and illustrated by Nate Treme of the Highland Paranormal Society.
Aside from the use of skill rolls, Ghost Star also has rules for inventory and travel. Characters start with 10 inventory slots, and can gain another each time they return to Mars with 5 artifacts. Presumably, items from the equipment list take up 1 slot each, although this isn't mentioned. Ancient Alien Tech is more cumbersome, and each one takes up 2 slots.
|Earth Expedition Two - click here to view|