<li>For zeroconf (bonjour), the "enable link-local messaging" checkbox, you need dbus-glib, python-avahi</li>
<li>dnsutils (or whatever package provides the nslookup binary) for SRV support</li>
<li>gtkspell and aspell-LANG where lang is your locale eg. en, fr etc</li>
<li>gnome-python-desktop (for GnomeKeyring support as password storage)</li>
<li>gir1.2-gnomekeyring-1.0 for GnomeKeyring support as password storage</li>
<li>kwalletcli (for support of KDE Wallet as password storage)</li>
<li>notification-daemon or notify-python (and D-Bus) to get cooler popups</li>
<li>D-Bus running to have gajim-remote working. Some distributions split dbus-x11, which is needed for dbus to work with Gajim. Version >= 0.80 is required.</li>