There are also several comic anthologies. There is a full list [here].
There are two companion shorts called “Side Bunny” and “Side Tiger” in which all the other heroes visit the respective main character’s apartment. “Side Bunny” takes place sometime during the ten months between [episode 13] and [episode 14]. “Side Tiger” takes place one month after the epilogue. You can watch them on YouTube here: [Side Bunny] and here: [Side Tiger].
There are two movies -
The first half of [Tiger&Bunny: The Beginning] is basically a recap of the first two episodes, but it also includes a lot of extra scenes that were cut from the aired episodes and an extra episode that takes place between episode 2 and episode 3. It’s definitely worth the watch. You can watch it online [here].
[Tiger&Bunny: The Rising] takes place sometime 1 to 3 years after the anime ends about 2 years after the epilogue. You can watch it online [here].
All of the above ↑ are 100% Canon.
There is a third manga serialization, by Sakakibara Mizuki, that deviates from Canon. It sort of follows the first couple episodes, but goes full AU by episode 8. You can read it [here].
You can find a list of artbooks and guidebooks [here].
