ProLink lube is a shop favorite for most lubrication tasks. The thin bodied lube makes for great use on chains, but also cables, housing, and any pivots. It utilizes a molecule which bonds to metal surfaces, creating less friction, while also repelling water and preventing corrosion. Beneficially, it is light enough that it does not build up gunk like most lubricants.
ProLink is also available in a unique syringe like applicator, called the Luber Pen. For a lubricant designed specifically for off road, or long distance riding, try ProGold's Xtreme lube.