A example of script, generating random strings (can be used for captcha, password, etc.)
Space to generate new text. Variables (coloring, characters to include) can be costumised in the start of event.

A nice turret example, esp. if you got a pro edition.

A example of nice fog of war. Most likely for use in strategy games.

A example of how-to-do view zoom in\out (in-example, handled by mouse wheel)

A example of drawing more "real" 3d in lite edition of gamemaker. Includes example of player (ball, w/ 3d physics).

Sample of lite edition compatible light system. Includes omni and flash light. Inside, a interactive demonstration of features.

Sprite rectangle system. Very helpfull in creation of ui.

A example of how to make non-individual outline for objects (see screenshot).

A example of how-to-do a clock that'll show time elapsed from the game start.

Have fun and practice