For reference try it :
1. Tiny ERP, http://www.tinyerp.org/
2. Web ERP, http://www.weberp.org/
3. Compiere, ERP dan CRM, http://www.compiere.com/
4. Adempiere, http://www.adempiere.com/
5. Openbravo, http://www.openbravo.com/
all of the above is free, adjust it according to your company's business
Can anyone recommend a good free erp/crm software? I have a web development business and need to keep a comprehensive client list and accounting ledger. I also want to create invoices from it as well as keep track of work done for each client.