Resets some defaults in Lion, namely clearing the Launchpad, showing the user Library folder and some other stuff.

roar.sh

#################################### Keyboard ####################################

# Enable full keyboard access for all controls (e.g. enable Tab in modal dialogs)
defaults write NSGlobalDomain AppleKeyboardUIMode -int 3

#################################### Trackpad ####################################

# Enable tap to click on a Magic Trackpad
defaults write com.apple.driver.AppleBluetoothMultitouch.trackpad Clicking -bool true

# Enable tap to click for the active user
defaults -currentHost write NSGlobalDomain com.apple.mouse.tapBehavior -int 1

# Enable tap to click on the login screen
defaults write NSGlobalDomain com.apple.mouse.tapBehavior -int 1

#################################### Dock ####################################

# Pin Dock to the end.
defaults write com.apple.dock pinning -string end

# Automatically hide and show the Dock
defaults write com.apple.dock autohide -bool true

# Remove the auto-hiding Dock delay
defaults write com.apple.Dock autohide-delay -float 0

# Enable highlight hover effect for the grid view of a stack (Dock)
defaults write com.apple.dock mouse-over-hilte-stack -bool true

# Enable spring loading for all Dock items
defaults write com.apple.dock enable-spring-load-actions-on-all-items -bool true

# Hide indicator lights for open applications in the Dock
defaults write com.apple.dock show-process-indicators -bool false

# Show new list / stack style.
defaults write com.apple.dock use-new-list-stack -boolean true
#################################### Menu Bar ####################################

# Disable menu bar transparency
defaults write NSGlobalDomain AppleEnableMenuBarTransparency -bool false

# Show fast user switching menu as: icon
defaults write -g userMenuExtraStyle -int 2

# Show remaining percentage ; hide battery time
defaults write com.apple.menuextra.battery ShowPercent -string "YES"
defaults write com.apple.menuextra.battery ShowTime -string "NO"

#################################### Finder ####################################

# Allow quitting Finder via ? + Q; doing so will also hide desktop icons
defaults write com.apple.finder QuitMenuItem -bool true

# Disable window animations and Get Info animations in Finder
defaults write com.apple.finder DisableAllAnimations -bool true

# Show all filename extensions in Finder
defaults write NSGlobalDomain AppleShowAllExtensions -bool true

# Show status bar in Finder
defaults write com.apple.finder ShowStatusBar -bool true

# Disable disk image verification
defaults write com.apple.frameworks.diskimages skip-verify -bool true
defaults write com.apple.frameworks.diskimages skip-verify-locked -bool true
defaults write com.apple.frameworks.diskimages skip-verify-remote -bool true

# Automatically open a new Finder window when a volume is mounted
defaults write com.apple.frameworks.diskimages auto-open-ro-root -bool true
defaults write com.apple.frameworks.diskimages auto-open-rw-root -bool true
defaults write com.apple.finder OpenWindowForNewRemovableDisk -bool true

# Show the ~/Library folder
chflags nohidden ~/Library

# Hide other folders
chflags hidden ~/Music ~/Movies ~/Pictures 

#################################### iTunes ####################################

# Disable the Ping sidebar in iTunes
defaults write com.apple.iTunes disablePingSidebar -bool true

# Disable all the other Ping stuff in iTunes
defaults write com.apple.iTunes disablePing -bool true

# Make ? + F focus the search input in iTunes
defaults write com.apple.iTunes NSUserKeyEquivalents -dict-add "Target Search Field" "@F"

#################################### Safari ####################################

# Enable Safari’s debug menu
defaults write com.apple.Safari IncludeInternalDebugMenu -bool true

# Make Safari’s search banners default to Contains instead of Starts With
defaults write com.apple.Safari FindOnPageMatchesWordStartsOnly -bool false

# Remove useless icons from Safari’s bookmarks bar
defaults write com.apple.Safari ProxiesInBookmarksBar "()"

# Add a context menu item for showing the Web Inspector in web views
defaults write NSGlobalDomain WebKitDeveloperExtras -bool true

# Disable Safari’s thumbnail cache for History and Top Sites
defaults write com.apple.Safari DebugSnapshotsUpdatePolicy -int 2

#################################### Other Apps ####################################

# Enable the debug menu in Address Book
defaults write com.apple.addressbook ABShowDebugMenu -bool true

# Enable the debug menu in iCal
defaults write com.apple.iCal IncludeDebugMenu -bool true

# Only use UTF-8 in Terminal.app
defaults write com.apple.terminal StringEncodings -array 4

# Disable the “reopen windows when logging back in” option
# This works, although the checkbox will still appear to be checked.
# defaults write com.apple.loginwindow TALLogoutSavesState -bool false
# defaults write com.apple.loginwindow LoginwindowLaunchesRelaunchApps -bool false

# Enable Dashboard dev mode (allows keeping widgets on the desktop)
defaults write com.apple.dashboard devmode -bool true

# Enable QuickTime autoplay on open.
defaults write com.apple.QuickTimePlayerX MGPlayMovieOnOpen 1

#################################### Global ####################################

# Change screenshot default folder
mkdir -p ~/Pictures/Screenshots
defaults write com.apple.screencapture location ~/Pictures/Screenshots

# Expand save panel by default
defaults write NSGlobalDomain NSNavPanelExpandedStateForSaveMode -bool true

# Expand print panel by default
defaults write NSGlobalDomain PMPrintingExpandedStateForPrint -bool true

# Disable the “Are you sure you want to open this application?” 
# defaults write com.apple.LaunchServices LSQuarantine -bool false

# Display ASCII control characters using caret notation in standard text views
# Try e.g. `cd /tmp; unidecode "\x{0000}" > cc.txt; open -e cc.txt`
defaults write NSGlobalDomain NSTextShowsControlCharacters -bool true

# Increase window resize speed for Cocoa applications
defaults write NSGlobalDomain NSWindowResizeTime -float 0.001

# Avoid creating .DS_Store files on network volumes
defaults write com.apple.desktopservices DSDontWriteNetworkStores -bool true

# Disable the warning when changing a file extension
defaults write com.apple.finder FXEnableExtensionChangeWarning -bool false

# Show item info below desktop icons
/usr/libexec/PlistBuddy -c "Set :DesktopViewSettings:IconViewSettings:showItemInfo true" ~/Library/Preferences/com.apple.finder.plist

# Enable snap-to-grid for desktop icons
/usr/libexec/PlistBuddy -c "Set :DesktopViewSettings:IconViewSettings:arrangeBy grid" ~/Library/Preferences/com.apple.finder.plist

# Disable the warning before emptying the Trash
#defaults write com.apple.finder WarnOnEmptyTrash -bool false

# Empty Trash securely by default
defaults write com.apple.finder EmptyTrashSecurely -bool true

# Require password immediately after sleep or screen saver begins
defaults write com.apple.screensaver askForPassword -int 1
defaults write com.apple.screensaver askForPasswordDelay -int 0

# Fix for the ancient UTF-8 bug in QuickLook (http://mths.be/bbo)
# Commented out, as this is known to cause problems when saving files in Adobe Illustrator CS5 :(
echo "0x08000100:0" > ~/.CFUserTextEncoding

# Reset Launchpad
[ -e ~/Library/Application\ Support/Dock/*.db ] && rm ~/Library/Application\ Support/Dock/*.db

# Kill affected applications
for app in Safari Finder Dock SystemUIServer Terminal; do killall "$app" >/dev/null 2>&1; done