A distilled list of open-source CRM software

Source: https://opensource.com/business/16/2/top-6-open-source-crm-tools-2016 + community contributions

Name	Source Code	Language	Home Page
EspoCRM	github.com/espocrm/espocrm	PHP	https://www.espocrm.com
SuiteCRM	github.com/salesagility/SuiteCRM	PHP	https://suitecrm.com
Oro CRM	github.com/orocrm/crm	PHP	https://www.orocrm.com
CiviCRM	github.com/civicrm/civicrm-core	PHP	https://civicrm.org
Fat Free CRM	github.com/fatfreecrm/fat_free_crm	Ruby	http://www.fatfreecrm.com
Odoo	github.com/odoo/odoo	Python	https://www.odoo.com
Krayin	github.com/krayin/laravel-crm	PHP (Laravel)	https://krayincrm.com
Dolibarr	github.com/Dolibarr/dolibarr	PHP	https://www.dolibarr.org
Vtiger	code.vtiger.com/vtiger/vtigercrm	PHP	https://www.vtiger.com
SplendidCRM	github.com/splendidcrm/SplendidCRM-Community-Edition	C#/.Net	https://splendidcrm.com
X2CRM	github.com/X2Engine/X2CRM	PHP	https://x2crm.com
Hammer CRM CE	github.com/roskus/hammercrm	PHP (Laravel)
meow	github.com/nash-md/meow	TypeScript
Twenty	github.com/twentyhq/twenty	Typescript	https://twenty.com
iDURAR	github.com/idurar/erp-crm (source available)	JavaScript	https://www.idurarapp.com

Defunct

Name	Source Code	Language	Home Page
Zurmo	bitbucket.org/zurmo/zurmo	PHP	http://zurmo.org