Purchase Request is an alternative and simple module to Approvals
Add Multiple Products on Purchase RFQ
Odoo Discount For Purchases
Auto bill when picking is done
Make invoices for all ready purchase orders
Add stored related field 'Commercial Supplier' on POs
Purchase Order Line Template
Add a way to print recommended products for supplier
Prevent recompute if only quantity has changed in purchase order line
Show currency rate in purchase stock picking.
Update Supplier Rank when creating a Purchase Order
Avoid creation of zero quantity invoice lines from purchase
Display Top Buying Products Based On Vendor Bills