Evercontact - Your contacts always up to date and automatically with Evercontact.
Issuetrak - Issue tracking software for help desk and customer service
CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.
Deskun - Deskun is a Help Desk system inside Gmail. It enables you to support customers directly from your mailbox, manage projects, and use free features for Gmail.
Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses
Kapdesk - Kapdesk offers support teams with a helpdesk software to streamline support tasks.