[Android Software Development] CyanogenMod:
CyanogenMod is a free, community built, aftermarket firmware distribution of Android 4.0 (Ice Cream Sandwich), which is designed to increase performance and reliability over stock Android for your device.

#include <std_disclaimer.h>
/*
* Your warranty is now void.
*
* We are not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this ROM
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/

CyanogenMod is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restore the Google parts. CyanogenMod does still include various hardware-specific code, which is also slowly being open-sourced anyway.

All the source code for CyanogenMod is available in the CyanogenMod Github repo. And if you would like to contribute to CyanogenMod, please visit out Gerrit Code Review. You can also view the Changelog for a full list of changes & features.

Instructions:

First time flashing CyanogenMod 9.0 your device, or coming from another ROM?

Root the device and install ClockworkMod Recovery. Instructions are available here.

Perform a NANDroid backup of your current ROM.

Format the system, data & cache partitions of your device.

Perform a factory reset.

Flash CyanogenMod.

Optional: Install the Google Apps addon package.

Upgrading from earlier version of CyanogenMod 9?

Perform a NANDroid backup of your current ROM.

Flash CyanogenMod (your Google Apps will be backed up & restored automatically).

Issues?

Experience issues? Please provide the following info to our bug tracker:

If the device was hard reboot, please provide the file "/proc/last_kmsg".

If the device was soft reboot or is "bootlooping", please run a logcat and provide the full output.

Please use Pastebin when possible.

Download Links:

CyanogenMod:

Latest version: cm-9.0.0-RC1

SE XperiaArc-LT15i - anzu:

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Google Nexus S - crespo:

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Google Nexus S 4G - crespo4g:

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LG Optimus Sol - e730:

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T-Mobile LG myTouch - e739:

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T-Mobile LG myTouch - e739:

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Samsung Epic 4G - epicmtd:

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Samsung Galaxy S2 - galaxys2:

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SE Xperia Neo V - haida:

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SE XperiaNeo-MT15i - hallon:

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SE XperiaNeo-MT15i - hallon:

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Samsung Galaxy S2 ATT - i777:

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Samsung Galaxy S2 (G) - i9100g:

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SE XperiaPro-MK16i - iyokan:

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Google Galaxy Nexus (GSM) - maguro:

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SE XperiaMiniPro-SK17i - mango:

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SE XperiaMiniPro-SK17i - mango:

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Samsung Galaxy Note (intl.) - n7000:

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Samsung Galaxy Tab (GSM) - p1:

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Samsung Galaxy Tab (CDMA) - p1c:

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Samsung Galaxy Tab (P1000L) - p1l:

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Samsung Galaxy Tab (P1000N) - p1n:

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LG Nitro HD / Optimus LTE - p930:

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HTC Sensation - pyramid:

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SE XperiaActive-ST17i - satsuma:

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SE XperiaActive-ST17i - smultron:

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Asus EeePad Transformer - tf101:

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Asus Transformer Prime - tf201:

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Asus Transformer Pad - tf300t:

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Samsung Galaxy Nexus (vzw) - toro:

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Samsung Galaxy Nexus (sprint) - toroplus:

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SE XperiaRay-ST18i - urushi:

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Motorola Xoom (wifi) - wingray:

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SE Xperia Play -R800i - zeus:

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SE Xperia Play CDMA-R800x - zeusc:

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Google Apps addon:

Version: gapps-ics-20120317

Mirror: link

Mirror: link​

The CyanogenMod team would like to thank everyone involved in helping with testing, coding, debugging & documenting! Enjoy!