Instant TNT:
Instant TNT will explode as soon as it is lit, it has no fuse time.



Meteor Shower TNT:
When it is lit, Meteor Shower TNT will summon meteorites to rain down from above, dealing damage to the landscape.



Creeper TNT:
When it explodes, Creeper TNT will shoot out four ignited creepers in all directions.



Forest TNT:
Forest TNT will spawn eight fancy oak trees around it when it esplodes.



Random TNT:
Random TNT has an unknown fuse timer. It can range anywhere from instant, the thirty seconds.



Pink Sheep TNT:
When exploded, Pink Sheep TNT will shoot out 8 pink sheep.



Lightning TNT:
On detonation, Lightning TNT will summon 5 Lightning Bolts.



Confetti TNT:
Confetti TNT summons a bunch of confetti particles when it explodes.



Smoke Bomb:
When it explodes, the smoke bomb will summon a bunch of black particles, and make every entity near it invisible for 15 seconds.



Arrow TNT:
Arrow TNT will shoot a barrage of arrows up into the sky.



Rotten TNT:
This will give all near entities hunger and nasuea.



Winter TNT:
This will make a patch of Snow, a Spruce Tree, and spawn a Snowman.



Shulker TNT:
This will cause all near entities to levitate upwards a fatal distance. (Yes, this works for other primed TNT's!)



Blaze TNT:
On detonation, this will shoot out four angry Blazes.



Ender TNT:
This will teleport all near entities to a random location within 20 blocks. (Yes, this also works for other primed TNT's!)



Supernova:
This will cause a colossal explosion. It has a fuse time of 10 seconds, and is not recommended for lower end computers.