something like the jailbreak tweak Activator

Activator allows you to invoke actions using shortcuts from anywhere in the iOS. You would be surprised by the number of shortcuts you can use such as double tap on the status bar, triple tap the Home button, double press the sleep button to trigger stock actions or launch an app or go to the Settings toggle. It offers almost limitless shortcuts to make it easier to use your iPhone.

Activator is a must-have jailbreak tweak for power users.


something like the jailbreak tweak SBSettings

SBSettings offers a faster way to access iOS Settings from any app without going through the hassle of exiting the app and launching the Settings app. Jailbreak app developers can also create custom toggles for SBSettings that can be installed from Cydia, which can then be quickly accessed by users via SBSettings. You can access SBSettings either by swiping on the Status bar or via the Notification Center.


something like the jailbreak tweak WinterBoard

WinterBoard is one of the most popular jailbreak apps that allows you to download custom themes from Cydia, that can be applied to change the look and feel of your iOS device.

WinterBoard allows you change the icons, modify`the look and feel of status bar, dock, lock screen, change the font and lots more. You can also customize all kinds of system sound with Winterboard. Another great feature of WinterBoard is that there is no limit on the themes you can install and you can also mix & match several themes together.

Jay Freeman aka saurik has updated WinterBoard to 0.9.3908 to add support for iOS 6.1 or lower, along with support for A6 CPU, which powers iPhone 5.

something like the tweak Auxo

Cydia developers have released a number of tweaks to replace iOS app switcher, but Auxo, which replaces the app icons in the app switcher with a card-like screenshot of the current state of the app and offers tons of other features, is easily the best app switcher replacement and our favorite jailbreak tweak of 2012.

The latest version of Auxo v1.3-1 is compatible with iOS 6.1 to iOS 5.1. Developers have also mentioned that it should work with iPhone 5, however since they will be able to test it only for the jailbreak is released, they cant confirm it.

something like Mobile Substrate

saurik has also released an updated version of the Mobile Substrate (v0.9.3999.6) to add support iOS 6.1, which is critical as it is used by multiple jailbreak apps. It includes support for Substrate safe mode feature, which allows you to disable Substrate entirely by holding down Volume Up button as the device reboots, so that you can open Cydia and uninstall them. It is useful while bypassing horribly broken tweaks that can prevent the iOS device from starting up at all.

something like veency


There are a number of apps on the App Store which allow you to remotely access your Windows PC or Mac from the iPhone.

However, Veency, the iPhone app developed by Jay Freeman (aka Saurik) works the other way around, it allows iPhone users to remotely control their iPhone from a PC or Mac via a VNC client.

Theming thinks like jail broken users can customizing everything such as icons animated weather widgets on lock screens and springboards

Maybe a version of iOS that can be tampered with to the users liking

SMS:
SMS signature
iMessage colors
texting background like you can have a special background when that person calls you except when your texting and it would be cool to time stamp every text and have that contacts picture next to your conversation.
Quick compose/reply

An app or setting like activator or zephyr to make custom gestures to toggle things

Built in sbsettings

App like ifile

Moving wallpapers

Siri or Siri alternitive for older idevices

Xcode for windows and other operating systems

Chances to EARN In store credit in iTunes or AppStore like shop to earn

Something like windows phone kids corner where you can have like a separate account and share your device.

Android pattern locks are cool to... And so is facial recognition.

Option to hide news stand. Stocks and passbook.

App to make an app.

Make your own social app with access to tumblr Instagram Facebook google+

Car finder maybe call it iFindMyCar


Browser:
Safari Downloading
Option to use different browser as default
Flash video support

Beats audio

Battery saver mode.

Built in function to set up I device to a computer and email service where they can go on a computer and set it up as missing device and it will take a picture when someone unlocks it and sends it to your email

Function to see what is using the most battery life

Be able to transfer files from idevices to Xbox or ps3 which need to recognize the device as a USB

Support for listening to music from idevices on ps3 or Xbox

Make purchases from iTunes with mobile plan

Using idevices with non iTunes media and programs other than iTunes.

Ability to block calls and or texts from specific numbers.

Parental controls

Reset password with security questions or email

Sbringboard and lock screen widgets.

idevice app for windows to test things on

iTunes addon to find album art and lyrics.


Ability to re-Theme the I devices head to toe from custom icons to custom status bar I cons from colors on everything like the battery, to animated widgets on home and lock screen.

Built in offline utilities such as translator or dictionary

Unlimited folders

Option to delete news stand, stocks , voice memos and passbook.

iTunes app on I device to edit song info or album art