Requires the library mod Collective.

Natural Charcoal makes wildfires useful! Whenever a log is destroyed via fire, it has a chance to drop charcoal. Charcoal is immune to fire, so it doesn't get destroyed by other fires nearby. By default it's a 2/3 chance for one to generate, though this can be changed in the config.

It is also possible to put logs next to a campfire to turn them into charcoal. This is slightly faster than using a furnace: Four pieces in 30 seconds instead of 40 when smelted.

Configurable: ( how do I configure? )
charcoalIsImmuneToFire (default = true): Whether the charcoal item should survive when being dropped inside fire.
burnedLogBecomesCharcoalChance (default = 0.67, min 0, max 1.0): The chance a log block that has been burned turns into charcoal.
charcoalDropAmount (default = 1, min 1, max 64): How much charcoal should be dropped from a burned log.

A fire passed through the area! Useful, as it generates charcoal :)

Charcoal has a chance to drop whenever a log is destroyed via fire:

It is also possible to create charcoal via the campfire:

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You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge ecosystem.

Serilum.com contains an overview and more information on all mods available.

Comments are disabled as I'm unable to keep track of all the separate pages on each mod.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!