NOOBS (New Out Of Box Software) - An easy Operating System install manager for the Raspberry Pi
Official documentation for the Raspberry Pi
Source code for ARM side libraries for interfacing to Raspberry Pi GPU.
Sense HAT firmware and driver
GTK version of raspi-config
Master copies of config and theme files used for Pi LXDE look and feel
Modifications to PCmanFM required for new UI
Jessie version of alacarte menu editor
Customised LXPanel code used in Raspbian
Mods to Gnome graphical package installer
New preferences application for customisation of Pi version of LXDE.
Modified keyboard mapping dialog
Mods to the LXinput keyboard and mouse settings app.
Data logging code for the Raspberry Pi Weather Station HAT
Fixes to the VCL library which supplies the widget handling for LibreOffice