There were quite a few things related to crafting that you could exploit in vanilla Skyrim. These mods aim to make the game either more realistic or more fun, and often a combination of the two:
Please remember to endorse any mods you download and like, and if you appreciate all the hard work that goes into creating a mod, consider giving kudos to the author on Nexus as well (the Give Kudos button can be found on the user’s page).