Also strong
ERP and CRM module suite for SMEs (invoices, stock, agenda).
erpcrmphp
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5 tools match your filters
Top pick
Full ERP on the Frappe stack (Python/JS) as SAP alternative narrative.
erpmanufacturing
Also strong
Modular business apps for CRM, inventory, accounting, and websites.
erpcrmpython
Honorable mention
MER-stack open ERP/CRM application.
erpmern
Honorable mention
Java/Spring ERP system for inventory and business flows.
erpjava