Placeable Gunpowder Mod
Placeable Gunpowder Mod 1.10.2, 1.7.10 lets you place down gunpowder as a fuse for TNT that can be any length: no need for repeaters and redstone.
Screenshots:
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.
How to install:
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Download Links for Placeable Gunpowder Mod 1.10.2, 1.7.10
For Minecraft 1.7.10
For Minecraft 1.10.2 and 1.9.4