I have shortlisted in random order the apps I have on my iphone and ihope they will also help you to enhance your iphone experience.
RTM(Remember the milk) - Easist way to remember and you can tag the location where it should be
done.
==iBooks ==- best way to read books on your iphone
Around Me - Search anything around you, it will also show you how far you are from the available options besides their contact numbers.
My Wallet - Easisest way to keep a tab on your spendings and savings etc
Fastnumber - Fastest way to add a number in your contact list
Convertunits - self explanaotry
Yourtube - add an option to download it
MakeItMine - change your carrier name
Weekcal - calender+reminder
iFile - iphone windows explorer
Notifier - notifies on status bar, a must have
Elert - crisp alert for your emails - anywhere
Dropbox - Cloud box for your stuff
eWallet - Save your wallet in iphone
==BytaFont ==- Change fonts for your phone
iBlacklist - Lets you create a list of callers you dont wanna attend to
FindMyPhone - Find your phone by sending it an sms from any other phone, will make your phone scream and send back the gmap coordinates
Wikipanion - Wikipedia in your phone
Whatsapp - an amazing app to chat to anyone anywhere
biteSMS - a twist to your existing message app with a nice notifier
Emoji - add funny things in your messages
Howstuffworks(HSW) - and you know it
Tip of my tounge - search a word without pounding your brain, it works on hints you have
Saavn - listen to your fav bollywood music online
Winterboard - beautify your phone
Downloadable Settings’ apps:-
Barrel: super way to swipe pages on your phone
Enhanced Tabs - What safari is missing
Iconoclasm -enhance your icon space resolution, i.e. add more icons per page/dock
Locktopus - easist way to lock the apps u wanna lock.
==LSrotator ==- Lock Screen Rotator
Mail Enhancer - Self Explanatory
Recent Delete - lets you delete recent call list selectively
SnapTap - user your volume buttons to snap pics
Stampr - Add date/time stamps on your pics
Weather Icon - see current weather on the icon itself and on the Stauts bar.
==Five icon Dock - ==Five icon dock
Key Vibrate - Android feel
MultiIconMover - Move multiple icons in a single touch
EZdecline - Decline or Accept a call on Lockscreen, no need to swipe, just touch the requisite option.