Simple Contacts Pro SE

Extended version of Simple Contacts Pro that supports separate address fieldsGPL-3.0-only

Fake Contacts

Create fake phone contacts, for data-poisoning.MIT

SD Contacts

Automatically store your contacts to your SD cardApache-2.0

Contacts

Contacts Organised by GroupApache-2.0

My Contacts

Quickly access your contactsApache-2.0

Contacts Import

Import your CSV contacts from a desktop client without any cloud syncing.Apache-2.0

Shortcuts for Calendar/Contacts

Add shortcuts for new calendars and contactsGPL-3.0-only

Fossify Contacts

Manage your contacts privately and efficiently with vCard supportGPL-3.0-only

Connect You

Privacy focused contacts and SMS messenger app build with MD3GPL-3.0-only

WhatsApp Contact Adder

Add WhatsApp contacts without giving WhatsApp access to your contacts!GPL-3.0-only

Kolab Client

Sync contacts/calendarGPL-3.0-only

Multi Sms

Send SMS to many contactsGPL-2.0-only

Contact Merger

Index and merge contacts with LuceneApache-2.0

Corporate Addressbook

Lookup Exchange GAL for contactsApache-2.0

Identiconizer!

Identicons for your contactsApache-2.0

OpenContacts

A different database for contacts to keep them private only to you.GPL-3.0-only

Dumbphone Assistant

Copy contacts to SIM card and backGPL-2.0-only

Infomaniak kSync

Automatically sync your contacts and calendarsGPL-3.0-only

DecSync CC

Sync contacts, calendars and tasks without a server using DecSyncGPL-3.0-only

SMS Import / Export

Imports and exports SMS and MMS messages, call logs, and contacts.GPL-3.0-or-later