Not sure if I do it correctly, do let me know as I would like to keep this list clean and neat for everyone.
Just added one TCPMP, Cause this player really rock!!I've transplanted this list from kvpug. Thanks to doc for the google cache link

Please feel free to add more!

I've also tested the links and removed the broken ones.
A. General applications1.
Avantgo2.
Plucker (offline browser)
3.
Happy Day (keep track of birthdays,anniversaries etc)
4.
Yanoff (offline NNTP newsreader)
5.
IsiloX (web clipper for Isilo)
6.
Moon Phase (tell you when full moon is - data can be exported to date book!)
7.
Lunar Calendar 1.2 Chinese Calendar - works on OS4 without need for Chinese Fonts. OS5 - Chinese Fonts support needed. Excellent Program - except for a few bugs. Chinese Zodiac signs included.
8.
DicMake 1.5 Dictionary making application: create your own custom dictionary at your fingertips!
9.
Snap: you get to take a snap-shot of your palm application; store as bitmap file onto extension card. (now I know how reviewers extract their snapshots)
B. Productivity (datebook enhancements, apps useful in work etc)
1. Dates! (sorry cannot locate URL now but try
DateToolz by yours truly)
2.
A5 (A Weekview for the Palm built-in Datebook and To Do applications)
3.
Today (Today gathers information from the built-in applications Date Book, Mail and To Do and displays the things to do today)
4.
Didlebug (Allows you to scribble info and add notes,alarms for each scribble)
5. Big Clock (alarm and time zone clock program)
6. Currency (for converting between currency rates)
7. Converter (for converting between metric and imperial etc for weight, length, shoe size, area etc)
8.
Button Launch 1.5 A excellent button launch program (OS5 supported). Unlimited number of programs you can launch with just a few buttons pressed.
9.
MyCheckbook Great freebie to manage your bank accounts and expenses.
10.
Unit2Unit Unit conversion software. Convert from one unit system to another for most common measurements like Temperature, Speed, Distance, Area, Mass etc.
11.
MoneyTender Quick, easy, and simple to use, MoneyTender keeps track of your accounts.
C. Office applications (ebook readers, database etc)
1.
CSpotRun (CSpotRun is a free reader for documents in the popular Pilot DOC format.)
2.
Handyshopper (HandyShopper is a great shopping list tool, with plenty of features)
3.
List 4.
Tiny Book Reader (TiBR is a freeware PalmDoc books reader for Palm OS. It is a small, but full featured application)
5.
Palm Reader (now known as eReader)
6.
Pilot-DB Freeware Database program with Desktop import/export.
7.
iSilo Free Edition (great doc reader with smooth scrolling action).
8.
Bible Reader (enough said!)
D. Utilities (Apps which boost the usefullness of PalmOS)
1.
Graffiti Anywhere (Graffiti Anywhere allows you to use the Graffiti recognition system anywhere on the screen)
2.
Switch (OS5) (Switch5 is a PalmOS 5 app which provides a simple way to switch between recently used applications. Think of it as a PalmOS 5 version of SwitchHack)
3.
OKey - For Palms that have the 5-way Dpad
4.
Colorize (Colorize lets you select from several color themes. You can also export color themes to Memopad and edit them (or beam them to other people) and import color themes from Memopad)
5.
X-Master (X-Master is an easy-to-use hack/extension management program)
6.
Filez (FileZ is a full featured file manager and system utility)
7.
Yaps (Yaps (Yet Another Password Safe) stores your passwords and other confidential information on your Palm, using 256-bit encryption)
8.
Disable Buttons Prevent your Palm from accidentally powering on and draining the battery
9.
Digifix 1.2 (cures mad digitizer syndrome)
10.
Crash! (auto soft reset so you don't have to look around for that paper clip!)
11.
Font Hack (works in conjunction with X-Master, Alpha Fonts, CoolFonts etc)
12.
Pilot Install Installs PalmOS Software WITHOUT HotSync (into Ram or SD card)
13.
Autodimmer Automatically lower screen brightness after certain time
14.
CradleSnd Automatically launches any program when plugged into cradle (useful for Clie data import and CardExport program)
15.
SyncBack Automatically brings you to any program after hotsync (i use it to go back to the laucher screen)
16.
MSMount Enables you to run programs and database directly from expansion card (not for OS5 though) ps. item number 3, 13-16 are all done by a kind programmer,Tatsuo Nagamatsu. Just wanna take this opputunity to thank him for all those great freewares! btw, programs 13-16 are run directly from Palm preference. there is no icons to launch the files.
17.
LCD Analyzer Enables you to check your LCD screen display. VERY useful for T3 - some defective LCD screens have surfaced based on response from other owners.
18.
Malaysian Holidays 2004- MobileDB Some nice chap has put up the 2004 holidays for MobileDB users
19.
Capitalizer does what it says-automatically capitalizes the letter you are writing when you write on the divide between the numeric and alphabet grafitti pad. Can someone add the link...?
20.
Noah Lite English-English Dictionary.
21.
GridLock is a simple & effective security application for your Palm device.
22.
TimeCopy Timecopy will copy the time, date, timezone, and daylight saving information from your desktop PC to you PalmOS device at each hotsync. You have to make sure your PC's time is accurate!!!
23.
DS Clock Great windows freeware that can be used with TimeCopy to sync your PC (and therefore your palm) with atomic clock servers
24.
StabilityTest Allows Palm users to test their device, packed with software, on stability and system crash issues.
25.
FileProg a Filez-like application that excels at copy, cut, delete and paste functions.
26.
Blue Fang is a free alternative to the highly rated but not free BTtoggle Pro. It saves power by turning off the Bluetooth radio when not in use.
E. Games 1.
Space Trader 2.
Checkers 3.
Vexed 4. Bridge (it's not real clever, but not bad for a free app for Palm)
5. Spades (the card game)
6. Bismark (a solitaire card game)
7.
Crosswords 4.0.5 Crosswords is a single- or multi-player crossword puzzle game for PalmOS. It is played by the same rules as Hasbro's "Scrabble" ® game and includesan English dictionary, dictionary browser, and configuration program.
8.
Boxman 9.
Traffic! An implementation of a popular sliding-piece puzzle game requiring careful visuo-spatial planning.
10.
HK Majong Classic majong game (monochrome but works on T|E)
11.
Mulg II Guide a marble through various mazes.
12.
Pocket Dimension The ultimate freeware PDA role-playing game.
13.
Space War For Star Trek addicts. Rise though the ranks and upgrade your starship while you wage war against your enemies. Can play against the simulator or with your friends.
F. Medical 1.
Medcalc - medical calculator
2.
Medmath - another medical calculator
3.
Medrules - general medical algorithms
4.
ePocrates - great free drug database
5.
Shots - a great immunization guide
6.
BloodPressMgr This application keeps track of the blood pressure readings.
7.
Eat Watch An implementation of the Eat Watch® nutrition and exercise log and analysis software for the Palm Computing Platform.
G. Travel 1.
Metro - the Kuala Lumpur database is in the zip file when you d/l the program
2.
Mapopolis - use in conjunction with free
Malaysian maps H. Music/Multimedia 1.
ChordDB Guitar Chords - Good app!
2.
Kinoma (is it free...?) - the player is free.
3.
Guitar Tuner Lt - essential for all the guitar players...
4.
RealOne (is it free...?) - i think so ? supports Tungstens & Zires. (unfortunately we can't get the latest version. so just settle for the previous one. lookout for "PREVIOUS VERSION") down load and enjoy !
5.
TCPMP (is it free...?l do donate if you like it, else use it for free) - Amazingly well video player for several video formats!
I. Only for Clies 1.
Keep Wide Remembers the last state of the virtual graffiti
2.
ClieMounter Mounts and unmount cf and memory stick without physically insert/uninserting it (pls right click the link and choose "Save target as..."
3.
AlbumSwap From the programmer of ClieMounter, this program makes it possible for u to create one folder for one album for your audio player
4.
CF Utility NX70/NZ90's CF slot can now be used as CF Memory expansion ps. items 1-4 have is confirm working and very useful for my NX70. dunno about other Clies. check out Cliesource if u r not sure how to use (it's worth ur effort!)
J. For Muslims 1.
GICalendar converts between Gregorian and Islamic calendars.
2.
PrayerMinder for the Palm displays the Islamic prayer times for the present day, anywhere on Earth.
3.
Palm Quran The complete Holy Quran in Arabic on the Palm Pilot for FREE. Palm Quran does not require Arabic support or extensions.
4.
Translation of the Qur'an by Abdullah Yusuf Ali. This DOC format is viewable with any of the doc readers.
5.
Translation of Sahih Bukhari is the English translation of Hadith collection by Bukhari in DOC format. Translation is by M. Muhsin Khan. Type "Sahih Bukhari" on the search function at Memoware's website. Web version can be found
here.
6.
Translation of Sahih Muslim is the English translation of Hadith collection by Muslim in DOC format. Translation is by Abdul Hamid Siddiqui. Type "Sahih Muslim" on the search function at Memoware's website. Web version can be found
here.
7.
Yaasin - Arabic Text, English & Malay Translation, and Transliteration.
Could contributors please reply by QUOTING and then remove the [ quote ] and [ / quote ] marks so that the LINKS are preserved.P/S: Please keep this thread clean and add only great new freeware to the posts.