Evercontact - Your contacts always up to date and automatically with Evercontact.
Callmama - Get cheap international calling, international virtual number, Call Mama Gives an added advantage to send message and make calls to non-user of Callmama App.
CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.
CallHippo - Easy to use Phone System with World-Class Support
Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses
KrispCall - Virtual cloud phone system for business