For 5e? There ain't much. The RftLW book has everything mechanical, and a Google search of UA: Artificer should find you most of the prior iterations. I think there are some YouTube videos of Crawford explaining it as well, as well as at least one DragonTalk that was archived on it.

If you are looking for prior editions, the task is fairly large. The vast majority of the artificer stuff was in Eberron, both the 3e and 4e.

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