My list of applications, games not included.
App names in blue are recommended for the general users. Others depends on your own needs/wants and personal preferences.
BeejiveIM - $15.99Many say it's the best IM app out there. I went straight for it without trying other other IM apps. Works great
Air Sharing - $4.99Makes your iPod touch a storing device through WiFi. You can only add/remove files via your computer. iPod touch can only store the files and also view selected file types.
WifiTrak - $0.99Better than the built-in wireless network detector, though those undetected by the built-in ones would most probably not be of any use (insufficient signal strength for a decent connection).
1Password - FREE
eWallet - $9.99
mSecure - $2.99Password managers. Personally I prefer 1Password as it has an auto-fill feature in its built-in browser. Even at sites that it fails to auto-fill, a column will show on top with your log-in information. However, its built-in browser does not sync with Safari's cookies and all. It also doesn't support multiple pages
IINM.
eWallet and mSecure seems quite alike to me, but I never really got to use much of it as I'm just too used to auto-filling (Roboform on my PC for years now). These two allows you to keep other information such as credit card information, bank accounts information, etc. encrypted. 1Password is only for website log-ins.
Graphing Calculator - FREEA 2D graphing calculator. It's decent, though I feel kind of limited as its y variable can only be linear.
PCalc Lite - FREEA more comprehensive calculator than the built-in one.
Wiki Mobile - $2.99Pretty obvious - A Wikipedia app. There's a number of free ones out there, though from the reviews I just went for this.
WordBook English Dictionary & Thesaurus - $3.99A pretty good dictionary app. Pronunciation available offline. Two other variations of better pronunciation available via Internet.
myLite - FREE
Flashlight - FREE
Torch - FREEVariations of flashlight apps. myLite and Flashlight offers several variations of lights. Personally I prefer myLite for its ease of use. Prefer Torch when all I want is just a white light.
Crazy Pumpkin - FREEWhat its name says. A crazy pumpkin.
Notespark - $4.99Syncs notes through the Internet. Able to view, edit and delete on the iPod touch. Synced notes will be available offline. Connection to their server may be slow at times (I believe this is Streamyx's issue). Decent, but probably not really worth the price.
iHandy Carpenter - $1.99Bought it 'cause I thought it's pretty cool. Has 5 tools: plumb bob, bubble level bar, steel protractor and steel ruler. Wonder if it'll actually come in to practical use one day..
FullBrowser - FREEA web browser that displays websites full-screen (tap to show address bar and bottom back, forward and refresh buttons). Doesn't share cookies with Safari though, and no multi-page.
Free Memory 1.4 - $0.99Frees up memory (RAM) of your iPod touch when it is below 20MB. Works pretty well.
WritePad - FREEA decent text editor.
Google Mobile App - FREEBasically a shortcut to Google's variation of services.
PayPal - FREEPayPal on-the-go. Rather limited, probably better to just log-in at Safari.
iXpenseIt - $4.99 (Lite available)
Balance - FREEExpense trackers. Haven't utilized them
AppSniper - $0.99Tracks apps/games that are on sale and more.
Also, another app that I will be getting soon would be either Jaadu VNC, Jaadu RDP, or LogMeIn Ignition. All paid apps, the Jaadu apps cost $24.99 whereas LMI Ingition costs $29.99. For remote desktop
Note: Prices are as of February 8, 2009. App information are not guaranteed accurate and other information are solely personal opinions.