My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
Evercontact - Your contacts always up to date and automatically with Evercontact.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.
Symphytum - Symphytum Project
Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses