> For the complete documentation index, see [llms.txt](https://docs.b2b-sellers.com/b2b-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons.md).

# Available Add-ons

- [Cost centers](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/cost-centers.md)
- [Customer Specific Product Numbers](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/customer-specific-product-numbers.md)
- [Offer Management](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/b2boffers.md): Interactive offers created and negotiated directly in the shop
- [Order Lists](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/order-lists.md): Order templates and product lists for professional procurement
- [Spare Parts](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/spare-parts.md)
- [Product Request](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/product-request.md)
- [Single Sign-On (SSO)](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/single-sign-on.md): Letting customers, employees and sales representatives log in with an external identity provider
- [Discount Rate](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/discount-rate.md): Company-wide percentage discounts with a per-product ceiling
- [Partial Assortments](https://docs.b2b-sellers.com/b2b-platform/user-guide/available-add-ons/partial-assortments.md): Showing each customer only the part of the catalogue they are allowed to buy


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