Free works on software for pda

Users with a GPS device can use Navizon worldwide. And Navizon will allow you to get a GPS fix where you couldnt before (indoors, urban canyons etc...) by automatically switching to WiFi or Cellular positioning when GPS signals are lost.
Users who dont have a GPS device can still benefits from Navizons cool features thanks to Navizons WiFi and Cellular positioning modes (if their area is covered by Navizons database).
If you have GPS applications, you can also plug them into Navizon by using Navizons output COM port.
Navizon works on any Pocket PC equipped with Wi-Fi and/or cellular phone (GSM).
System requirements:
- Windows Mobile 2003

HandyShopper is a great shopping list tool, with plenty of features.

You can even use it for other kinds of lists! HandyShopper works on Palm OS v2.0 through v4.0, on all Palm-based devices (including HandSpring, Sony, HandEra, etc).

PhonExt makes it easier to scroll through your contacts, select a phone number and make a phonecall. It works only on Pocket PC 2002 - Phone Edition systems

Converts log files of WiFi Access Points detected by NetChaser and WiFi-Where to OV2 format so they can be displayed as Points Of Interest on TomTom Navigator 5 maps.
Prerequisites
APmapper works on the same PDAs that support TomTom Navigator 5.
You must have at least 1 TomTom map stored in the root directory of your SD card.
You must have at least 1 NetChaser log file (stored in the directory /Palm/Programs/Netchaser on your SD card) or 1 WiFi-Where-exported memo (starting with "WiFi-Where Export").
Enhancements:
- Bugfixing - Now searching for TomTom on all volumes, not only the first one (useful for LifeDrive users)

PDA Maze is a first-person perspective (3D) maze game. It was designed for the Agenda VR3 Linux-based PDA, but works on anything with X-Window (like Linux and Unix desktops, other Linux-based PDAs, etc.) A Qtopia version has also been created for the Sharp Zaurus
Main features:
- 3D, first-perspective view (prerendered for speed)
- Screen scrolls when you rotate
- Walls colored differently on different sides
- Four background (skyline) photos
- Button (keyboard) and stylus (mouse) controls
- Game timer
- Different maze sizes
- Modes for partial (build as you go), total and no overview maps
- Sound effects
System requirements:
- Sharp Zaurus

Reversi or Othello is a well known boardgame. Its easy to play, but a challenge to win - and really this version is a challenge.
The board consists of 8x8 fields, the two players alternately put white and black stones onto the board. Your goal is to have the most stones at the end of the game. To do so, directly enclose your white opponent horizontally, vertically or diagonally. All surrounded stones become yours - change to your black color. If you cannot surround stones, you have to pass. The game ends if the board is full or you and the computer have to pass.
The program individually fits boardsize to your Phone/Palm/PocketPCs screensize, works in color, grayscale or black/white, playable on each Java Phone/Palm/PocketPC with at least 200 KByte Heapmemory (64KByte linear accessible, older Siemens phones not). You can use 2,4,6,8 or joystick to move the cursor, press 5 or fire to place your black stone.
Important: This Game is designed for every Java Phone, color, grayscale and black/white - works on Palm and PocketPC too (use IBMs Websphere for free). The program needs 200 KByte of Heapmemory (64KByte linear accessible)!
Main features:
- - 6 different levels (Weak, Moderate, Normal, Good, Strong and Hard, the "Normal" level was tested with many other Phone Java Reversi Games without losing)
- - shows your Move- Possibilities (optional)
- - shows last Computer- Move
- - animated stones (optional, if you have problems deactivate it)
- - first Move for Computer or Player (startposition commutable too)
- - really quick calculation and strong AI
- - shows Time- Bar during calculation
- - really small, only 16 KByte
System requirements:
- Mobilephone with Java Engine (200 KByte Heapmemory, 64 KByte linear accessible), Palm or PocketPC with Java Engine (for example IBMs free WebSphere)

Reversi or Othello is a well known boardgame. Its easy to play, but a challenge to win - and really this version is a challenge.
The board consists of 8x8 fields, the two players alternately put white and black stones onto the board. Your goal is to have the most stones at the end of the game. To do so, directly enclose your white opponent horizontally, vertically or diagonally. All surrounded stones become yours - change to your black color. If you cannot surround stones, you have to pass. The game ends if the board is full or you and the computer have to pass.
The program individually fits boardsize to your Phone/Palm/PocketPCs screensize, works in color, grayscale or black/white, playable on each Java Phone/Palm/PocketPC with at least 200 KByte Heapmemory (64KByte linear accessible, older Siemens phones not). You can use 2,4,6,8 or joystick to move the cursor, press 5 or fire to place your black stone.
Some features:
- 6 different levels (Weak, Moderate, Normal, Good, Strong and Hard, the "Normal" level was tested with many other Phone Java Reversi Games without losing)
- shows your Move- Possibilities (optional)
- shows last Computer- Move
- animated stones (optional, if you have problems deactivate it)
- first Move for Computer or Player (startposition commutable too)
- really quick calculation and strong AI
- shows Time- Bar during calculation
- really small, only 16 KByte
Enjoy the Game!
System requirements:
- This Game is designed for every Java Phone, color, grayscale and black/white - works on Palm and PocketPC too (use IBMs Websphere for free). The program needs 200 KByte of Heapmemory (64KByte linear accessible)!