Samsung Galaxy S III CostumROM UltimaROM

 Official XXUGML2 4.3 Jellybean.
 True AOSP style
 AROMA Installer 2.70RC1
 OTA Updates
 Good battery life
 Many Kernels Included
 Bloatware Remover Option
 Essential Apps included, Install optional
 Custom Launchers Option
 Build.prop Tweaks
 Latest SuperSU and su binary
 Updated System/Stock apps

AOSP
 Google Keyboard
 Google Launcher
 AOSP/Samsung Messaging Option
 Google E-Mail
 Google/Samsung Contacts & Phone (in call screen) Option
 AOSP/Samsung Browser Option
 Google Desk Clock
 Google Play Edition 4.4.2 Camera and Gallery option (flash fixed)
 Samsung Camera and Gallery option

UltimaROM Themed Apps
 Google Play Store Holo
 YouTube Holo
 Dropbox Holo
 Google Mail (GMail) Holo
 Google Calendar Holo
 Google Play Music Halo
 And many more

Mods
 Google Quick Settings
 Wake Lag Fix
 Custom Boot Animations
 CRT Animation
 Call Recording Option (Samsung only)
 Hostname Changing
 No SMS receipent limit/MMS conversion
 No SMS in Call log (Samsung Only)
 Colour changes and transparency options for Statusbar
 On-screen Navigation Bar option

Download

Instal

Copy the UltimaROM file to your Galaxy S3's internal SD card.

Turn off your Galaxy S3.

Boot into Recovery Mode by pressing and holding down the Volume Up, Home, and Power buttons.

Make a NANDroid Backup by selecting Backup and Restore. Select Backup.

Select Wipe Data/Factory Reset. Confirm the action on the next screen.

Select Install ZIP from SD card.

Select Choose ZIP from SD card and then select the UltimaROM file.

Follow the on-screen instructions.

Select Reboot System Now.