Apps with 'Owncloud integration' feature
Evernote is a cross-platform, freemium app designed for note taking, organizing, and archiving.
rsync for cloud storage. Rclone is a command line program to sync files and directories to and from the cloud.
Plain text notepad with markdown support and todo list manager for Linux, Mac OS X and Windows, that works together with the notes application of ownCloud.
Open Source Password Manager.
Passman allows you to host your passwords and credentials on your own Nextcloud or ownCloud instance.
The encryption is done on the client and server side with AES256 bit encryption.
PolarisMail is a dedicated e-mail services provider based in Montreal, Quebec, Canada.