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iDempiere - iDempiere Business Suite ERP/CRM/SCM done the community way.
Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses
DataNote ERP - DataNote ERP is a complete ERP solution built for multiple industries such as construction, engineering, food and beverages, metal processing, and healthcare, among others.
Pipeliner CRM - Pipeliner CRM empowers small to medium-sized sales teams to close more deals and lower risk. Implementation and training are a breeze. Mac & Windows.
PracticePanther - PracticePanther offers CRM, invoicing, time tracking and communication solutions for law firms.
Zoho CRM - Omnichannel CRM for Businesses of all sizes