It may not be the lightest (not far off though), but the 360 Degrees Furno Stove would have to be the best value stove on the market.

Three folding arms provide stable support for pots up to 20cm diameter, and enable compact stowage in a pack. Its stainless steel and alloy body features a folding heat adjustment knob, and provides durable, lightweight performance.

• 99g
• 11,900BTU/hr output.
• Boils 1 litre in 3min 20sec.
• Adjustable flame control.
• Includes plastic storage case.