- [Grilo](https://mail.gnome.org/archives/grilo-list/2017-February/msg00000.html) and [Grilo plugins](https://git.gnome.org/browse/grilo-plugins/commit/?id=ea047c4fb63e90268eb795ed91a09a2be5068a4c), the Grilo multimedia framework
- [GStreamer](https://cgit.freedesktop.org/gstreamer/gstreamer/), multimedia framework (not the default yet)
- [GTK+](https://git.gnome.org/browse/gtk+/log/?h=wip/meson), the multi-platform toolkit used by GNOME (not merged yet)
- [Valum](https://github.com/valum-framework/valum), a micro web framework written in Vala
- [Wayland and Weston](https://lists.freedesktop.org/archives/wayland-devel/2016-November/031984.html), a next generation display server (not merged yet)
- [ZStandard](https://github.com/facebook/zstd/commit/4dca56ed832c6a88108a2484a8f8ff63d8d76d91) a compression algorithm developed at Facebook (not used by default)