Alternatives to Celestia

	Celestia Version: 1.6.1 3D space simulation in real time with massive star database	Scratch 2 Offline Editor Version: 450 Unique tool with multimedia capabilities that teaches critical thought	GeoGebra Version: 6.0.741 Math software that easily links geometry with algebra	$Math Science Quest thumbnail$ Math Science Quest Version: 1.4 Learning game for essential reasoning and scientific skills
LICENSE	Free	Free	Free	Free
LANGUAGE	English	English	English	English
OS	Windows XP	Windows 7 Also compatible with Windows 8, Windows Vista, Windows 2000, Windows XP	Windows 7	Windows NT
Author	Shatters	MIT	International GeoGebra Institut	Accelerated Learning Foundation
Rating	7.5/10 (209)	6.7/10 (3853)	6.8/10 (904)	8.3/10 (11)