Here is a list of bundled tools which you may find in OS X 10.10 Yosemite, together with their standard folder paths. You may not have all of these, but this should help you find those which you do have.

Activity Monitor /Applications/Utilities/Activity Monitor.app
AirPort Utility /Applications/Utilities/AirPort Utility.app
App Store /Applications/App Store.app
AppleScript Utility /System/Library/CoreServices/AppleScript Utility.app
Archive Utility /System/Library/CoreServices/Applications/Archive Utility.app
Audio MIDI Setup /Applications/Utilities/Audio MIDI Setup.app
Automator /Applications/Automator.app
Bluetooth File Exchange /Applications/Utilities/Bluetooth File Exchange.app
Boot Camp Assistant /Applications/Utilities/Boot Camp Assistant.app
Calculator /Applications/Calculator.app
Calendar /Applications/Calendar.app
Chess /Applications/Chess.app
ColorSync Utility /Applications/Utilities/ColorSync Utility.app
Console /Applications/Utilities/Console.app
Contacts /Applications/Contacts.app
Dashboard /Applications/Dashboard.app
Dictionary /Applications/Dictionary.app
Digital Color Meter /Applications/Utilities/Digital Color Meter.app
Directory Utility /System/Library/CoreServices/Applications/Directory Utility.app
Disk Utility /Applications/Utilities/Disk Utility.app
Dock /System/Library/CoreServices/Dock.app
DVD Player /Applications/DVD Player.app
FaceTime /Applications/FaceTime.app
Feedback Assistant /System/Library/CoreServices/Applications/Feedback Assistant.app
Finder /System/Library/CoreServices/Finder.app
Font Book /Applications/Font Book.app
Game Center /Applications/Game Center.app
Grab /Applications/Utilities/Grab.app
Grapher /Applications/Utilities/Grapher.app
Image Capture /Applications/Image Capture.app
Installer /System/Library/CoreServices/Installer.app
iTunes /Applications/iTunes.app
Keychain Access /Applications/Utilities/Keychain Access.app
Launchpad /Applications/Launchpad.app
Mail /Applications/Mail.app
Maps /Applications/Maps.app
Messages /Applications/Messages.app
Migration Assistant /Applications/Utilities/Migration Assistant.app
Mission Control /Applications/Mission Control.app
Network Diagnostics /System/Library/CoreServices/Network Diagnostics.app
Network Utility /System/Library/CoreServices/Applications/Network Utility.app
Notes /Applications/Notes.app
Photo Booth /Applications/Photo Booth.app
Preview /Applications/Preview.app
QuickTime Player /Applications/QuickTime Player.app
RAID Utility /System/Library/CoreServices/Applications/RAID Utility.app
Reminders /Applications/Reminders.app
Safari /Applications/Safari.app
Screen Sharing /System/Library/CoreServices/Applications/Screen Sharing.app
Script Editor /Applications/Utilities/Script Editor.app
Server /Applications/Server.app
Spotlight /System/Library/CoreServices/Spotlight.app
Stickies /Applications/Stickies.app
System Image Utility /System/Library/CoreServices/Applications/System Image Utility.app
System Information /Applications/Utilities/System Information.app
System Preferences /Applications/System Preferences.app
Terminal /Applications/Utilities/Terminal.app
TextEdit /Applications/TextEdit.app
Time Machine /Applications/Time Machine.app
VoiceOver Utility /Applications/Utilities/VoiceOver Utility.app
Wireless Diagnostics /System/Library/CoreServices/Applications/Wireless Diagnostic.app
X11 /Applications/Utilities/X11.app