Packages with the notification use flag

mail-client / claws-mail : An email client (and news reader) based on GTK+

  • Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify

mate-base / mate : Meta ebuild for MATE, a traditional desktop environment

  • Force notification daemon to default to MATE's notification daemon. Enabled by default. Disable if it causes conflicts with other installed desktop environments.

net-im / qtox : Most feature-rich GUI for net-libs/tox using Qt5

  • Adds support for GTK Status Notifier tray backends

net-im / toxic : A curses-based client for Tox

  • Enables desktop notifications with libnotify, with sound support.

net-misc / eventd : A small daemon to act on remote or local events

  • Enable plugin to display on-screen notifications

net-news / liferea : News Aggregator for RDF/RSS/CDF/Atom/Echo feeds

  • Enable support for Popup Notifications plugin that display popups informing about new updates