Odoo ERP consists of more than 1000+ partner applications for different industries. Odoo itself have 50+ in-built applications for different verticals like eCommerce, Manufacturing, Retail, etc.
Odoo ERP is an open source ERP and is available in both community & enterprise version, where community version is for small and medium scale industries and is freely available in odoo platform. while Odoo enterprise is Paid licensed based SAAS ERP mostly preferable to the clients with big business processes and lots of data.