Games

Deals with	astrophysics // chemistry // computer science // geography // geology // physics // programming
Intended for	elementary school // middle school // high school // university
Available on	Web
Cost

Deals with	programming
Intended for	elementary school // middle school
Available on	Android // iOS // Windows // Mac
Cost	paid

Deals with	computer science // math // programming
Intended for	high school // university
Available on	Web // Android // iOS
Cost	paid // free demo