[Sony Xperia M] 8hodgsonkh:
Since i haven't seen anyoen create a list for custom ROMs and kernels so far i decided to make one. I have tested every single ROM and will give a few small details about a few. ALl these ROMs and kernels are great and we should all respect the developers hard work :D

List of ROMs;

-CM11 Beta X., the one that started it all, wouldn't be many kitkat roms without this

- Znxt Evolution 1.0.1, a custom 4.3 ROM for Xperia M Single sim, has a nice UI and icon pack. Comes with a custom kernel if you want to use it, for unlocked bootloaders.

http://xdaforums.com/showthread.php?t=2733039

-XLICIOUZ 2.0 is another 4.3 custom ROM for Xperia M single sim, mostly has layout and UI mods.

http://xdaforums.com/showthread.php?t=2733835

-SPL Gaming Rom (mine and buda1996's ROM ;)) is a cyanogen based kitkat 4.4.2 ROM. It's made mostly for gaming but is on first build and has home FC.

http://xdaforums.com/showthread.php?t=2706780

-Xperia M ROM, 4.3 ROM which is zipaligned, deodexed and pre-rooted.

http://xdaforums.com/showthread.php?t=2699085

-ICE CREAM BUBBLE, a 4.1.2 ROM which has heavily modded UI and Aroma installation.

http://xdaforums.com/xperia-m/development/page2?nocache=1&z=9898210023761426

-ICB for 4.2

http://xdaforums.com/showthread.php?t=2614053

-Pixel ROM 1.0, a kKitKat 4.4.2 ROM

http://xdaforums.com/showthread.php?t=2605240

-KitKat Carbon ROM Beta 1, Carbon based rom for Xperia M SS

http://xdaforums.com/showthread.php?t=2606245

-KitKat Unoffical BETA 5, port of FXP by PecanCM, last version

http://xdaforums.com/showthread.php?t=2584956

-KitKat PAC-man ROM

http://xdaforums.com/showthread.php?t=2678107

-KitKat VanirAOSP ROM

http://xdaforums.com/showthread.php?t=2691995

-KitKat HellKat ROM Beta1

http://xdaforums.com/showthread.php?t=2616821

-KitKat Liquid Smooth v3.0 Beta

http://xdaforums.com/showthread.php?t=2671230

Kernels

-ElixER2.2 with OC [MENTION=2464761]156[/MENTION]6Mhz (removed from 2.2, still with 2.0) and UV with CWM 6.0.4.5, very smooth kernel for 4.1.2 single sim

http://xdaforums.com/showthread.php?t=2513677

-NeOcOre-Hybrid, a kernel for 4.2.2 (currectly using with my MSS with DS firmware cross flashed), includes OC to 1.7Ghz and GPU OC to 487Mhz, i achieved 17k in Antutu Benchmark with this kernel and battery life is quite good, lasts as long as long as KitKat with me (around 5 hours constant use, playing games web browsing etc)

http://xdaforums.com/showthread.php?t=2641741

-Smart Devil, 4.2.2 kernel includes CPU OC to 1566mhz and GPU OC to 450Mhz, also PS3 controller support.

http://xdaforums.com/showthread.php?t=2618625

-Znxt Kernel - a few features, has advantages over stock 4.3 kernel, visit the thread for more info

http://xdaforums.com/showthread.php?t=2733039

- KTT a 4.1.2 kernel for MSS, features OC to 1.3Ghz, UV and a few other features

http://xdaforums.com/showthread.php?t=2625189

- Ironbuang,a 4.1.2 kernel CPU OC to 1.2Ghz and GPU OC to 450Mhz, swap, zRAM

http://xdaforums.com/showthread.php?t=2625114

Stock backups and radios for CWM

(thanks to Bonoboo), Allows you to flash a baseband/radio modules or whatever of previous and current frimware for example if you were using 4.3 and wanted to go back to a 4.1.2 ROM you could easily flash 4.1.2 Radio if you do not have acces to a computer :)

User Noel Macwan has created a number of kernels and roms for Xperia M on SXDevelopers but he is banned from XDA and i will not post linsk for him, just google his name :P

Hope you liked my post, took me aroundd 40 minutes to create :) if ive missed something or ROMs have been updated, PM me and ill update :)