[Sony Xperia P, U, Sola, Go] kinglauryl:
CAUTION: It is recommended to create BACKUP or COPIES of the files below!!!

All the files below accumulated consumes around 250MB-270MB of storage space

All the files mentioned below are safe to delete, meaning if you delete them it wont interfere with the basic function of your android, unless you specifically use a certain app that is included in the list. My suggestion is instead of deleting the files move it to another folder or external SD card.

To move or delete the files, you must have root access and you must install root capable file manager, I recommend Root Explorer v3.1 which is the latest version.

SYSTEM\APP\

AppEnabler.apk

BlackTheme.apk - Silk Theme

BlackThemeBlueAccent.apk - XPERIA Theme

BlueTheme.apk - Sapphire Theme

Browser.apk - Default Browser

Chrome.apk - Chrome Browser

ClockWidgets.apk - Clock widget

compass.apk - Compass

CosmicFlow.apk - Live Wallpaper

EventStream.apk

EventStreamPluginFacebook.apk

EventStreamPluginTwitter.apk

Exchange.apk

Exchange2.apk

ExternalKeyboardJP.apk - Japanese keyboard

facebook.apk - Facebook

FBCalendarSync.apk	- Facebook related

FBIAppShare.apk - Facebook related

FBMediaDiscovery.apk - Facebook related

FBMusicLike.apk - Facebook related

FBSetupwizard.apk - Facebook related

figurerunning.apk - Figure Running

Galaxy4.apk - Black Hole Live Wallpaper

GenieWidget.apk

Gmail.apk - Gmail

GMS_Maps.apk - Maps

GoogleFeedback.apk

GooglePartnerSetup.apk

GreenTheme.apk - Emerald Theme

helpapp.apk - Help

HTMLViewer.apk

IddAgent.apk

JapaneseIME.apk - Japanese Keyboard

LiveWallpapers.apk - Live Wallpapers

LiveWallpapersPicker.apk - Selection for Live Wallpapers

livewaremanager.apk

micoach.apk - miCoach

MusicWidget.apk - WALKMAN widget

NoiseField.apk - Bubbles Live Wallpaper

NoteWidget.apk - Notes Widget

OnOffTools.apk - Toggle widget

OrangeTheme.apk - Amber Theme

PhotoWidget.apk - Photo widget

PinkTheme.apk - Quartz Theme

PlusOne.apk - Google +

POBoxSknMono.apk - Japanese Keyboard

POBoxSknPink.apk - Japanese Keyboard

POBoxSknSelector.apk - Japanese Keyboard

POBoxSknWood.apk - Japanese Keyboard

PurpleTheme.apk - Amethyst Theme

Radio3.apk - FM Radio

RecentCallsWidget.apk - Reent calls widget

retaildemo.apk

SemcDlna.apk

SemcDlnaHandover.apk

SemcEmail.apk - Email program

SemcFacebookProxy.apk - Facebook related

SemcIllumination.apk

SemcMetadataCleanup.apk - Music related

SemcNotes.apk - Note app

SEMCSetupWizrd.apk - Setup Wizard

SemcTvLauncher.apk

Skin1.apk - Quartz theme

SocialEngineCore.apk - SociaLife related

SocialEngineFacebookPlugin.apk - SociaLife related

SocialEngineFacebookShareFrwkPlugin.apk

SocialEnginePicasaPlugin.apk - SociaLife related

SocialEngineTwitterShareFrwkPlugin.apk - SociaLife related

SocialPane-Apps.apk - SociaLife related

SomcConnectivityCenter - Smart Connect Manager

SOMCTwitterAccount.apk - Twitter Related

SOMCTwitterSetupWizard.apk - Twitter Related

SomcXperiaLink.apk - Xperia Link

SoundRecorder.apk - Sound recorder use in SmallApps

storefront.apk

Street.apk - Street View

Talk.apk - Talk

talkback.apk - Talkback (Accessibility)

textinput-chn.apk - Chinese Keyboard

ThemeManager.apk - Theme Manager

timescaperssplugin.apk - Timescape related

TimescapeSpline.apk - Timescape

TopContactsWidget.apk - Top Contacts (Widget)

Torch.apk - Screen Flashlight

TwitterPostViewer.apk - Twitter related

UpdateCenter.apk - Update Center

Velvet.apk - Google Search

walkmate.apk - Walkmate app

WeatherWidget.apk - Weather (Widget)

WeatherWidget2.apk - Weather (Widget)

WikipediaPlugin.apk

YouTube.apk - YouTube

YouTubeKaraokePlugin.apk

YouTubePlugin.apk

SYSTEM\ETC\CUSTOMIZATION\PRODUCT\APPLICATIONS\

com.joelapenna.foursquared.apk	- FourSquare

com.qoowaa.act.apk - appXtra

com.sony.seconddisplay.view.apk - Media Remote

com.whatsapp.apk - WhatsApp

SYSTEM\ETC\PRODUCT\APPLICATIONS\

EnchantedForest.apk	- Live Wallpaper

livewallpaperearth.apk	- Live Wallpaper

magicbox.apk - EA Games

mcafeesuite.apk - McAfee Security

officesuite.apk - OfficeSuite (Viewer Only)

playnowclientarvato.apk - Play Now Store

smartcontacts.apk - Smart Contacts

trackid.apk - TrackID

wisepilot.apk - WisePilot Xperia

SYSTEM\ETC\TTS\LANG_PICO\

de-DE_gl0_sg.bin

de-DE_ta.bin

es-ES_ta.bin

es-ES_zl0_sg.bin

fr-FR_nk0_sg.bin

fr-FR_ta.bin

it-IT_cm0_sg.bin

it-IT_ta.bin

SYSTEM\VENDOR\PITTPATT

(entire folder) - face recognition