Hey everyone! This is a small mod that I've seen many requests for on minecraftforum. It lets you place down gunpowder as a fuse for TNT that can be any length: no need for repeaters and redstone!
You can light it with flint and steel or fire arrows, and you can also place it with dispensers. It does a bit of damage to entities standing on it as it goes off. It should work with any modded TNT as well.