The new Apps include S Note, WatchON (this has not included Malaysia and Singapore yet), S Health, S Translator, Calculator, and Gear Manager.
You’ll need a Samsung device running Android 4.4.2 and some of the new leaked APK’s will require the old version to be uninstalled, which you’ll need to be rooted in order to do.
You can download apk from here:
The new updated TouchWiz was heavily focused on during the Galaxy S5 launch as being redesigned with new flatter looking icons and UI in order to bring it more inline with the look and feel and Android. With these leaked Apps you’ll be able to see for yourself what the new TouchWiz looks like on your older Galaxy device.