MOST OF THESE ROMS ARE COMPATIBLE WITH THE NEXUS S 4G YET, DO NOT ATTEMPT TO FLASH.
4.0 [ICS ROMs]
Screen shots and short descriptions are coming
CyanogenMod 9 Alpha 12
AOSP ICS Build v3
(ICS) -Android 4.0
Ultimate ICS v0.1
Brainmaster’s tweaked ICS v6
reddv1's Stock Deodexed with KD1 Radio
Stock build that has been deodexed, zipaligned and contains the latest radio.
du5t3r's Stock Deodexed ZipAligned
This stock ROM is completely zipaligned and deodexed. Also has a memory tweak in the re-compiled stock kernel in order to improve battery life. Claims by du5ter is and I quote "FASTEST STOCK ROM YOU'LL FIND"
A AOSP build of 2.3.4 with very few additions added. Its purpose is to be completely stable and used for as a base for other ROMs (such as infin1ty).
"Blandroid is an Android ROM that was created to be as stable as possible while still providing some useful features not found in AOSP"
Built straight from AOSP, this is a minimalistic ROM with a few extra features like Adhoc wifi network support, ddvanced power menu, status bar power widget, and a few more.
While built of AOSP this ROM has more then meets the eye. Lots of additions such as notification control toggles, universal volume controls, SIP calling over 3G, and reboot options in power menu just to name a few.
This ROM is based off of 2.3.4 AOSP with some tweaks such as transparent status bar and battery percentage.
A very unique ROM made by the Chinese. Its running the latest software (2.3.4) and includes a bunch of features not found in other ROMs such as the unique notification toggles, 2 button screen capture, revamped menu system and more. This ROM supports RTL (right to left) Arabic and Hebrew.
SuperAOSP is built completely from scratch and has a plethora of features/additions. It has many features from CyanogenMod 7 along with extras such as SupSetup in which it lets you customize every aspect of the ROM.
A stock experience with additions such as notification power control, Voodoo sound and a better widget picker.
Is a AOSP ROM with Netarchys kernel and Zeam launcher out of the box with many other tweaks.
Based on the latest CM7 Nightly Source with additional stuff such as Netarchy kernel, more recent Google apps and themed sections such as transparent status bar, battery percentage and more.
CyanogenMod 7 Nightly Builds
Exactly as the title says. Nightly builds are normally released everyday and they include the latest commits from Team Douche. While not all can be considered "stable" this is XDA and we love to flash stuff This ROM supports RTL (right to left) Arabic and Hebrew.
This rom is based on a customized CyanogenMod 7 installation featuring Netarchy's latest kernel w/ BLN Support, Supercurio's Voodoo Sound/Color, Stock GB Launcher, and latest GAPPS. Its a mix between CM7 and stock.
AOSP ROM with extras such as being zipaligned, deodexed, Netarchy kernel and a theme.
Built on a nightly version of CM7 This has tons of extra goodies such as the MIUI camera, a different theme, and various performance tweaks and optimizations.
Based on a CM7 Nightly, this comes bundled with a theme and some other tweaks
Nexus S Mode
Built from AOSP, this is deodexed, zipaligned and comes with other goodies such as different animations, theme, bootanimation, and Netarchys 1.3.4 CFS Kernel + more.
Built from stock 2.3.4 this ROM has the Jame Bond Sabai kernel, includes the UD launcher, has the neat Apple vs LOL boot animation and a bunch of other tweaks and additions
CyanogenMod 7.0.3 (Stable)
The infamous CyanogenMod ROMs go way back to the G1 days. Without a doubt the most widespread ROM across all devices. Its built straight from AOSP with a numerous amount of customization, tweaks and extras with a insane amount of options found everywhere you look. This ROM supports RTL (right to left) Arabic and Hebrew.
The first and only Sense ROM for the Nexus S. It has come a long way but is not quite ready for daily use since many key features are yet to work such as mobile data, camera, bluetooth, etc. However its nice to try out to see what direction the ROM is heading to.
MoDaCo Custom ROM
Based off 2.3.3 this includes Paul's custom Modaco kernel, optimizations and EXT4 performance tweak. This ROM supports RTL (right to left) Arabic and Hebrew. This ROM supports RTL (right to left) Arabic and Hebrew.
A heavily modified and themed ROM based of 2.3.3. It is deodexed and includes things such as Netarchys kernel + CM7 additions
A stock ROM thats been modified to be as stable and fast as possible. Comes with Netarchy kernel and some tweaks from Supercurio
Master's Stock 2.3.3 - Deodexed - Four Flavors
A completely stock ROM that has been deodexed. Comes in 4 different versions that have things such as Voodoo kernel and stock kernel with root or no root.
Honeycomb 3.0 SDK port
*Warning this is not recommended for new people new to custom roms and what not. It's a proof of concept so take that into account of you decide to try it*
The well known tablet version of Android ported to the Nexus S. Since it is in Alpha 2 and because Google hasn't released the HoneyComb source yet many things are not working. This still won't stop many of us from trying it out and playing with Honeycomb!