Toons.TV

Toons.TV was a multiplatform entertainment channel owned and operated by the Rovio Animation division of Rovio Entertainment. It was available in most of the Rovio apps, video-on-demand providers, smart TVs and other connected devices, and also as an app. As of December 2014, its content was viewed more than four billion times.

It has been reported that as of the Summer of 2017, the Toons.TV website has been shut down, along with its mobile apps, and any links to it have been redirected to the Angry Birds' official YouTube channel, although the site's YouTube channel continues to exist. 

Shows
(Note: channels marked with a * do not appear in the Toons.TV standalone app due to them no longer present prior to that app's release)
 * Amazing Animals*
 * Angry Birds GO!
 * Angry Birds Star Wars II (AB Star Wars-exclusive)
 * Angry Birds Stella - A Sneak Peek!(Toons.TV app-exclusive)
 * Angry Birds Toons: Season 2
 * Bad Piggies
 * Chakra the Invincible
 * The Daltons
 * Oggy and the Cockroaches, Season 1*
 * Piggy Tales
 * Pigs at Work
 * Third Act
 * Qumi-Qumi
 * Rocket Science Show
 * Transformers Generation 1, Season 1*
 * Wallace and Gromit: Cracking Constraptions
 * Angry Birds Cinema
 * Angry Birds Nest
 * Angry Birds Seasons
 * Angry Birds Stella
 * Angry Birds Toons: Season 1
 * Angry Birds Toons Season 3
 * Angry Birds Transformers
 * Angry Birds Blues
 * Cinematic Specials
 * Game Trailers
 * Guest Stars
 * Lego Angry Birds (Toons.TV app-exclusive)
 * Oggy and the Cockroaches, Season 2*
 * Pucca
 * Space Goofs
 * Transformers Generation 1, Season 2*
 * Zig and Sharko
 * How to Train Your Dragon*
 * Disney Planes: Fire &amp; Rescue*
 * Oggy and the Cockroaches, Season 3
 * Log Jam
 * Shaun The Sheep
 * Littlest Pet Shop
 * Ruffle TV (a separate channel in Angry Birds (original), Angry Birds Seasons, Angry Birds Space, Angry Birds Star Wars, and Bad Piggies)
 * Fraggle Rock*
 * Pound Puppies
 * Tilly and Friends
 * Zooville
 * 50 Birds, 50 States
 * Rantanplan (Rintindumb)
 * Shaman's Quest
 * Canimals
 * Cut the Rope: Om Nom Stories
 * Kit 'n' Kate
 * Rainbow Ruby
 * Go Jetters
 * Plunder Pirates
 * Morph
 * Glumpers
 * Monsters and Pirates
 * Ollie the Little White Van

Trivia

 * Toons.TV has been added in Angry Birds in the Short Fuse update, in Seasons the Arctic Eggspedition update, in Rio the Rocket Rumble update, and in Star Wars in the Death Star II update. Angry Birds Free and Angry Birds Seasons Free don't have the Toons.TV (neither does the computer versions, and the Seasons Free doesn't have Toons episodes at all).
 * Fraggle Rock is the only series that is not available on the Internet.
 * Om Nom Toons is a ZeptoLab app featuring all the episodes from Om Nom Stories. It is known as a copy of Toons.tv and Angry Birds Toons.
 * Ironically, episodes from Piggy Tales: Third Act are available for watching there.