Thought this would be a great way for us to discover other 'must have' apps.

What apps/games would you recommend to others?

This is what I have currently installed on my iPhone:

Apps
Manifesto - A great RSS feed reader
Shazaam - For tagging audio tracks
Apple remote - Remotely control my itunes library.
Google - Installed this for the voice search feature
Facebook - Needs no explanation, a great interface
Ebay - Again, needs no explanation
AroundMe - Tells me everything around me, Restuarants, Petrol stations etc
Flixster - Gets movie info and ratings with links to movie sites etc, also shows local cinema times!
London Tube - This is really handy when in London (funnily enough)
Sky+ - I think this is UK only - allows me to set tv shows to record remotely
Air sharing - Use your iphone as a wireless network drive.
Simplify - allows you to access your home music library over the internet
VNC - remote control my Mac
CheckPlease Lite - Good for splitting the bill after dinner with friends

Games / Toys
Flight Control - One of my favourites, a really really addictive game
Pinball Dreams - An old Amiga classic
Rolando - Highly polished game with a great soundtrack
Monkey Ball
Edge
Trism
JellyCar - Great use of the accelerometer
iDracula
VirtualPool
Sway Lite
Labryinth 3D
Jabeh - Fantastic puzzle game
MouthOff - Great for amusing your niece/nephew
Lightsaber - Swing your phone like a lightsaber
iBeer - Gets some laughs at the bar! (though grows boring very quickly!)

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 Mac OS X 10.6.4 Retail || Intel Core2 Duo E8200 2.66GHz || Gigabyte G31M-ES2L || GeForce 6600 GT 128MB || Realtek ALC883 Audio || Realtek RTL8169 LAN || Samsung SpinPoint F1 1TB HD || Sony Dual Layer IDE DVD RW DW-D22A || Apple Aluminium Keyboard || Mighty Mouse

 MacBook Pro || 2.4Ghz Core 2 Duo || 200Gb HD || 2Gb Ram || NVIDIA GeForce 8600M GT

 iPhone 4 || 16Gb