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.
Currently working on only one sim detection.
I started edited CM11 for Samsung Galaxy S Duos S7562. I'll update soon this thread once I've uploaded the files. If you can help this project just PM me. Testing my edited version run smoothly not encountering any errors.
CM11 Android Kitkat for Samsung Galaxy S Duos S7562, ROM for all devices (see above for details)
ROM OS Version: 4.4.x KitKat
Based On: CyanogenMod
Last Updated 2014-06-30