Magic scroll (My Little Pony: Friendship Is Magic); via Cutie Map
Warp's vortex generator (Teen Titans)
True Key (Persona 3 FES)
Kagerō (Flame of Recca) using Jikuryūri, which allows her to travel through time via a portal, but it traps her within time itself, rendering her immortal.
Kurei Mori (Flame of Recca) using Jikuryūri to open a time portal in space, but cannot become immortal so he does not have to worry about being trapped in time.
A Time Sphere (Futurama) opens up for a one-way trip to the past when the Time Code is spoken.
Kratos (God of War) can create time portals via Mirrors of Destiny.
The five elemental magicians (Magic to Win) close the time portal they opened.
The Ilex Forest Shrine (Pokemon Adventures) is a portal into the crack of time, and requires Celebi contained in a GS Ball to travel safely.
The Time Eater (Sonic the Hedgehog) creating Time Holes, spacial rifts that allows people to travel through time and space to different locations and points throughout the timeline, even the faraway Planet Wisp.
The Time Eater (Sonic the Hedgehog) opening Time Holes to utilize its Warping Arm Attack, which appears at a specific point in the future.
The Door of Time (The Legend of Zelda) can only be opened by the Song of Time, but can allow anyone to travel back and forth of seven years.
The Gates of Time (The Legend of Zelda) are powerful artifacts that allow people to travel through time.
Starlight Glimmer (My Little Pony: Friendship Is Magic), casts a spell by using a magic scroll to open a time portal over the Cutie Map.
Cheetah Claws (Xiaolin Chronicles) allow the user to create a time bubble which allow them to travel to the past
Aku (Samurai Jack) opens a time portal, sending Jack into the distant future.