Exposure fusion takes the best tonalities of a group of images taken at different exposures and combines them in a 'fused' image. Or more technically "blends multiple exposures, guided by simple quality measures like saturation and contrast."(1) This can offer a more realistic natural looking final image than HDR.
A few advantages are that it doesn't take much computer processing power as there is no need to convert to HDR so it is more efficient and much quicker. This is great for time lapse shooting when you can accumulate thousands of photos which can take hours to process into HDR images for each frame of your final video. You can also use flash or light-paint in the fusion of photos, which adds a more unique advantage.
Other option for Mac and Windows are:
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