Hockey stick curve. Led to more use of slap shots. Created more movement on the puck when shot. High, hard shots easier to pull off.
Composite sticks. Lighter, more power on shots. More consistency, stick to stick. Less reliability.
Hockey skates. Composite blade holder make for much lighter skates, leading to more speed.
Composite materials in skate boots again mean lighter and more speed.
Stainless blades hold and edge longer for better push-off ,turning and stopping.
Lighter protective equipment produces more speed along with greater protection (and more use as a weapon in hitting).
Synthetic equipment is lighter, moisture resistant (lighter throughout a game), and for goalies has helped
transform the position.