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History, advantages and usage contexts of the PNG image format.

A flexible, optimized and free image format

History, advantages and usage contexts of the PNG image format.

 
GPL-distributed Python software that draws sunrise, sunset and daylight graphs.

Sunrise/sunset hours, all year long

GPL-distributed Python software that draws sunrise, sunset and daylight graphs.

 
Scoring tables, bidding system and memory cards for the game of bridge.

Thirteen cards and 635,013,559,600 possibilities

Scoring tables, bidding system and memory cards for the game of bridge.