GNOME Mobile is a SW stack that is a subset of the GNOME Desktop platform. The components were put together by Nokia and other companies involved in creating embedded systems. Details of their work is here: Gnome Mobile
Matchbox: Window Manager
Pango: Text Layout
Cairo: 2D Rendering
ATK: Accessibility Toolkit
Gnome VFS: Virtual FS
BlueZ: Bluetooth
Telepathy: IM/Presence
GConf: Configuration
DBUS: IPC
GStreamer: Multimedia
E-D-S: Contacts / Calendar
Avahi: Service Discovery