Salsa's Moto Ace range of drop bars are designed to be an economical option for bikes running a non-oversized stem, and the Short & Shallow is a good all-purpose bar for road riding. It's not that shallow, in spite of its name, but it is comfy and fairly inexpensive.
Another impossibly light unit from KCNC, this flat bar weighs in at a barely believable 119g. The Bone is constructed from T-7451 Scandium alloy, is 600mm wide and comes in standard and oversized clamp diameters.
KCNC are best known for their super-slinky drilled out bits but the SC Force handlebar is a simpler beast, a fairly standard road drop made from T-7451 Scandium alloy that's light and comfy, and not too pricy either.
Cinelli's Vai handlebar has been around for a while now but it's still well worth a look. As the ancient engineering cliche goes, pick any two from light, stiff or cheap. The Vai certainly ticks the cheap and stiff boxes, but light it ain't.
These oversize Ergo-Bend EA70 bars from Easton follow the trend for handlebars with less reach and drop than is traditional as manufacturers finally wake up to the fact that there are a lot of mere mortals out there that don't have the lanky arms of a 23 year-old Dutch rouleur or the stretching regime of roadie pros who can get into drops that are in a different postcode. Bring on the trumpets!