Easy Digital Download Purchase Limit extension allows you specify purchase limits on a per-product basis. Purchase Limits also allows you to limit the dates Downloads are available to be purchased by setting a start and/or end date.
Purchase Limit and FES are fully integrated. Vendors will able to set purchase limitations on their submissions. Also limitations can be set for vendor-uploaded products through the Edit Download screen once submitted by admin.
Purchase Limit supports the Wishlists extension