The flowwing apps are disabled / removed in official Android 4.3 in order to minimize contact with Google or minimize memory or cpu usage.
Android Live Wallpapers
Bubbles
Calendar
Calendar Storage
Chrome
com.android.browser.provider
com.android.providers.partnerbookmarks
com.android.wallpaper.holospiral
com.google.android.voicesearch
Currents
Drive
Face Unlock
Gmail
Google Account Manager
Google Contacts Sync
Google Korean keyboard
Google One Time Init
Google Partner Setup
Google Play Books
Google Play Games
Google Play services *
Google Play Store *
Google Search
Google Text-to-speech Engine
Google+
hangouts
iWnn IME
iWnnIME Keyboard
Keep
Market Feedback Agent
Network Location (coarse location)
One Time Init
Picasa Uploader
Search Applications Provider
Setup Wizard
TalkBack
User Dictionary
———-
BackupRestoreConfirmation.apk
BasicDreams.apk
Books.apk
BrowserProviderProxy.apk
Chrome.apk
EmailGoogle.apk
Exchange2Google.apk
FaceLock.apk
Gmail2.apk
GoogleBackupTransport.apk
GoogleContactsSyncAdapter.apk
GoogleEars.apk
GoogleEarch.apk
GoogleFeedback.apk
GoogleHindiIME.apk
GoogleOneTimeInitializer.apk
GooglePartnerSetup.apk
GoogleTTS.apk
Hangouts.apk
HoloSpiralWallpaper.apk
iWnnIME_Kbd_White.apk
iWnnIME.apk
Keep.apk
KeyChain.apk
KoreanIME.apk
LiveWallpapersPicker.apk
Magazines.apk
MediaUploader.apk
OneTimeInitializer.apk
PartnerBookmarksProvider.apk
PlusOne.apk
SharedStorageBackup.apk
TagGoogle.apk
talkback.apk
Thinkfree.apk
UserInfoWidget.apk
Velvet.apk
Videos.apk
VoiceSearchStub.apk
Wallet.apk