If you love fiddling with custom Android ROMs then you must definitely be familiar with CyanogenMod. The team has started seeding its latest M6 release of CyanogenMod 11 which is based on Android KitKat 4.4. The new update currently supports about 50 devices including the Galaxy Nexus, Nexus 4, Nexus 5, Nexus 7, Samsung Galaxy S, S2, S3, S4, and Note 2, LG Optimus G, G2, G Pro, HTC One and HTC One Mini. More devices will be added soon.
With this new update, the CM team has also announced that it will abolish its old stable/release candidate system and will replace it with milestone versions every two weeks. Currently the new milestone updates are being released every four weeks. Now this will be decreased to an interval of two weeks. The CM team says that the Milestones are just as usable as the Stables they replace, with the added benefit of offering a fast, predictable lane for patches to go out. Users who seek a stable version of CM should go for the latest available milestone for their device, while the ones who prefer having the latest update can stay on the Nightly releases which will contain the latest features but not quite stable.
Here is the official change-log for CyanogenMod 11 M6:
Check the official device list over here