[neomutt-users] Mutt additional packages

[H]

Running CentOS 7 and looking for the following packages used with mutt/neomutt as described by https://www.dj-bauer.de/once-forever-mutt-configuration-en.html:

- notmuch (tag mails). https://notmuchmail.org/ and https://src.fedoraproject.org/rpms/notmuch does not list Fedora EPEL 7.
- msmtp (send mails). Found in EPEL 7.
- offlineimap (sync mails). Would isync be a substitute?

The article above also mentions:

- khard (contacts book). Looks like it might be a KDE app, I need a Gnome app instead.
- vdirsyncer (sync contacts). Found it at https://github.com/pimutils/vdirsyncer.
- cron (automate scripts). Part of the OS.
- pass (password storage). Looks like the standard password manager.
- dunst (notification deamon). According to https://dunst-project.org/ it looks like it uses Wayland and CentOS 7 uses X11 according to my limited knowledge. Would that be correct? If so, is there a substitute app for C 7?

Thanks.