Kontact - Kontact is the integrated Personal Information Manager of KDE.
Retainly - Drip Campaign, Marketing Software Automation using email, SMS, Push & In-app messaging.
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Buzzportal - Buzzportal offers cloud-based multichannel marketing automation solutions.
Kontact - KAddressBook - KAddressBook stores all the personal details of your family, friends and other contacts.
eMarketeer - eMarketeer is your all-in-one marketing automation platform! Easy to use yet incredible powerful.