This list might make sticky(says Xianli). please suggest apps and games to add, and i will add them.
of course, you need to have a jailbroken iphone with installer application in order to add any of these.

Apps: for customizing your iphone:

Summer board: Allows you to scroll for more icons, change themes, wallpapers and icons

Customize: customizes your iphone's icons, sounds backround, icon location and much more etc...

iswitcher: change between a bunch of themes straight from your iphone

Categories: by bigboss, just awesome. the god of applications. categorizes your app icons.

MobileFinder: is a filesystem navigator and launcher with Copy, Move, Delete abilities...


Apps that make you proud:

mxTube: download youtube videos and save them, so you can view them with out internet connection. gives an option for high or low quality.

Listen: by erica sadun, samples music through mic, and tells you artist, album and song name!(currently down)

Apollo IM: Run Aim, MSN and ICQ on your iphone

VNotes: record voice notes and share them

Search: search your contacts by typing first few letters

Showtime: capture video and save it. 5 second limit unless you donate.(there is now a hacked version that lets you save unlimited video from the original maker so dont feel bad)

Send song: allows you to send a song from your iphone via email also to set any track as ringtone.

Sketches: draw on your pictures and email them (give ur gf bigger boobs )

Tunewiki: finds and displays lyrics to the songs you play from your iphone library

Todo list: self explanatory (worth being on this list?)

SMSd: Forward sms and create templates

iFlickr: upload pictures directly to your flicker account

iRadio or MobileScrobbler

Books: an ebook reader

Vnsea: for the extra techy,this is a tool to connect to a desktop PC and fully control it from a remote location.

vkconverter: very nicely made unit converter

dock: a small light in the bottom right corner of the screen. you pull it out to see more icons.

iSim: paid software but demo version alows: Import of phone numbers to Contacts from SIM, Export phone numbers to SIM card.

Wallpaper: share your wallpaper and view what others have as wallpaper or save.

PocketGuitar: <--- yes a guitar with frets and strings and all. a lil practice and u can kiss that Fender goodbye.

iAno: amazzzzing piano app.

Wikipedia: yes an OFFLINE wikipedia browser. "the sum of all human knowledge in your pocket" (but it takes 2gigs of storage)

Touchpad: use your iPhone as a wireless touchpad. You can control the mouse on your PC. click, double-click, and even drag.

iBirthday: birthday reminder

Speed dial: self explanatory

Game Emulators:

Nes: play those old school nes games on iphone
gpSphone: Play Game boy advance games on iphone
psx4all: play station emulator for iphone
Snes4iphone: super nintendo games (my personal favourite and most playable, although sound hasnt yet been implemented.)
ScumVm: Play computer adventure games such as indiana jones on your iphone.

Toys and Games:

icrosswords: pretty cool
4balls (1-2 players): strategy
iphysics
contrasense (1 player): action, drive a car via accelerator
music quiz: uses ur own music library
real artist: distort images of people you hate
domino: domino game (1-2 players)
ichess: chess game
iLabyrinth demo (1 player - full version not free): use the accelerometer to move a chromed ball around different levels.
isolitaire (1 player): card game.
huarongdao (1 player): move the biggest tile to the bottom.
dress up (iPhone only): dress up your friends in a bunch of different outfits
towers of hanoi (1 player): strategy
garf: fun memory game
Backgammon
iSlots
iSnake: personally i didnt like it thought was hard to control
5dice
idigger: little guy runs around collecting eggs and avoid balls crushing him. puzzle, vry old school graphics.
EvolutionRGB:just a little toy, mess with the elements of nature, fire, water, plant...
iZoo: bejeweled style game with many different skins


This is just a start, please suggest more to add if i missed anything, or to remove if you think its crappy. Ill edit the list daily.

Also if you want a certain app or game just search the forum for it and you'll probably find the source, or google! in case u can't find it, ask here ill give you the source np... (im just too lazy to type in all sources ), anyway i recommend you go to the other sticky on this forum and add all the sources there.

cheers.

Like the idea. "Top must have" is very subjective. I may like an app more that someone else.

Personally I think this page (http://iphone.fiveforty.net/wiki/ind...I_Applications) should be kept up to date.

true but this is still helpfull for someone who just got their iphone. i see too many ppl walking around with app-less iphones

I think you need first of all: Installer
MobileFinder
TextEdit
SendPicture: it doesn't resize images to send them thru mail as it does the native app.

I would recommend Categories and iSlots.

EDT

Im gonna use this post to ad what i find cause people are using it for questions and its gonna be hard for you to find the new apps

VKConverter

finally something like this is sticky

you need to add psx4all to the emulator list

i think categories has been taken down from the repo by biggboss, cus of many bugs reported, atleast i can't find it anymore, if im wrong and its still there lemme know, cus i also need it, i got 5 pages of app icons to scroll through

5 dice, [yatzee]
othello
idigger is funny

While we have weTool, SMSd is an optional.