Add modifications to The Sims 3 and the Sims 4 by launching the manager and incorporating the custom content seamlessly. Creating your own modifications such as new objects, hairstyles, clothing, accessories or patterns and including them is also possible.
TSR Workshop a Custom Content Tool for The Sims 3/4. This program was built to let you create any custom content you want. Be it hairstyles, objects, clothing, accessories or patterns, everything is possible with this in-house tool from The Sims Resource.