Pi-specific libraries?

[frylock]

In terms of software, I'm trying to make my ALARM machine conform as closely as possible with Raspbian (sonic-pi, minecraft-pi, wolfram-engine, etc.). So far it seems like I lot of work, but my rationale is that I want to build a system that can take full advantage of the Pi2's functionality, without having to run a Debian-based distro (I just dislike it).

I briefly emulated a Raspbian machine on my laptop, and I was able to find these packages specific to the Pi. They don't seem to have a counterpart on the ALARM repos, but maybe I'm wrong.

$this->bbcode_second_pass_code('', 'ii libraspberrypi-bin 1.20150130-1 armhf Miscellaneous Raspberry Pi utilities
ii libraspberrypi-dev 1.20150130-1 armhf EGL/GLES/OpenVG/etc. libraries for the Raspberry Pi's VideoCore IV (headers)
ii libraspberrypi-doc 1.20150130-1 armhf EGL/GLES/OpenVG/etc. libraries for the Raspberry Pi's VideoCore IV (headers)
ii libraspberrypi0 1.20150130-1 armhf EGL/GLES/OpenVG/etc. libraries for the Raspberry Pi's VideoCore IV
ii python-picamera 1.9-1 armhf Pure Python interface to the Raspberry Pi's camera module.
ii python-pifacecommon 4.0.0-1 all The PiFace common functions module.
ii python-pifacedigitalio 3.0.4-1 all The PiFace Digital I/O module.
ii python-rpi.gpio 0.5.9-1 armhf Python GPIO module for Raspberry Pi
ii python3-picamera 1.9-1 armhf Pure Python interface to the Raspberry Pi's camera module.
ii python3-pifacecommon 4.0.0-1 all The PiFace common functions module.
ii python3-pifacedigital-scratch-handler 2.0.5-1 all The PiFace Digital Scratch Handler.
ii python3-pifacedigitalio 3.0.4-1 all The PiFace Digital I/O module.
ii python3-rpi.gpio 0.5.9-1 armhf Python 3 GPIO module for Raspberry Pi
ii raspberrypi-artwork 20141115 all Copy of the Raspberry Pi logo
ii raspi-copies-and-fills 0.4-1 armhf Optimised memcpy/memset implementation for ARM11 used in Raspberry Pi')

My question is, where do I start? If these packages don't yet exist for ALARM, in the AUR or elsewhere, which one(s) should I try to build first? Some of them are just art, but others look like important libraries for interacting with the hardware.

[moonman]

You can lookup specific files in packages with 'pkgfile'.
I believe most of the stuff you are for is in raspberrypi-firmware-* packages