Use invoice merge regarding fields on Account Payment Partner
Set order company according to products company
VAT number required in checkout form
Prevent optional products to be sold singularly
Generates XML eCDF annual financial reports
Write comments in checkout process
Give a default value for country at checkout
Display your hr address book in your website
Add 1099 field to res.partner that will auto-check supplier
Enable tree_but_open action for One2ManyListView rows.