I have been looking for doctors, saving numbers, emails and working hours in a onlyoffice spreadsheet but its not really readable at a glance. Looked around for an address books app but neither gnome calendar nor Thunderbird meet my needs.
The features I would like in an address-book( not all of them are strictly need) are:
-custom fields. -ability to customize address fields to include stuff like landmarks, floors and district(could also do with removing stuff like Postal box or countries). -custom labels for fields like phone numbers(WhatsApp,telegram) or instant messaging(discord)
Not a priority
-add notes, maybe even add multiple notes to contact. -calendar integration, with ability to add dates to contacts that can include notes.
Did try cardbook Thunderbird add-on but it is mostly unresponsive. On gitlab, the last comits was from 4 years ago and the last released version was from 2018, dispite that, Thunderbird addon store still keeps receiving new version, even in 2026 and issues are still being opened with developer responding,even a few hours ago.
All to say, I think it went close source
Anyhow, I am not opposed proprietary apps necessary(would still pick open source if its an option) just wanted to note the add-on being close source(I think) for people in case anyone wants to know.
I’ve written a python/Qt script that keeps lists like those you mention. It’s sort of a poor-man’s database manager, but its only database is a collection of csv files.
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You can use an address list to keep track of contacts’ phone numbers, mailing addresses, and eMail addresses.
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You can use a calendar to remind you about events and appointments including date, time, and duration. You can add notes about finding the location and other prerequisites to attendance.
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You can keep separate passwords in a password list for every website you visit and every piece of gear you own.
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You can keep links to favorite websites in a bookmark list.
When I try to include a direct link to my python script, which does that, my responses and in fact the whole posted discussion are taken down. … something to do with self promotion of untested software I suppose. But you can find it in the Cheese Shop (See Wikipedia “Python Package Index.”) under tonto2.
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I switched to using Radicale a year ago, and I use my android contacts app to add and maintain that info. CardDAV has enough fields for me to add.
If you’re not averse to CLI and some tinkering, i think
khalmay suit your needs.The only address book I know is thunderbird any maybe the GNOME or KDE suite (their Personal Information Management (PIM) Suite).
Maybe the small desktops have alternatives.
Thunderbird supports CardDAV for syncronizing contacts too. But it is unencrypted so I wouldnt use it.
Etesync is encrypted.




