WmConsole is a console server for Windows Mobile devices which listen over BlueTooth RFCOMM channels. It allows the user to interact with the device using a commandline interface from a Linux or Windows workstation. You need the QTTY Linux/Windows client to access a WmConsole server.
Navlet is a navigation system for mobile devices such as PDAs, smart phones, and cell phones. It retrieves positioning data from any NMEA capable GPS receiver and displays the position on a digital map. External GPS receivers can be connected via a serial cable or Bluetooth. If your mobile device is connected to the Internet, it can download maps from a map server, or alternative use locally stored maps. It is also able to send the GPS data to a server via an HTTP connection.
NetClassifieds Free Edition is an online classifieds system based on NetClassifieds Standard Edition with all the same features and capabilities but a few limitations. It features ebay-style category selection and picture uploading with dynamic thumbnails when creating new listings, home page featured and category featured Listings, unlimited categories, a method for asking sellers a question, a Make an Offer feature, and more. The Listing Gallery (including "Gallery Featured" and the "Gallery Fee" option), image previews, and the bold listing, highlight listing, and slide show listing option are not included and only 250 active listings are possible.
Bemused is a system which allows you to control your music collection from your phone, using Bluetooth. It requires a Series 60 (e.g. Nokia 7650/3650) or UIQ (e.g. P800) phone and a computer with a Bluetooth adapter. While the official server runs on Windows, third-party servers have been written for Linux and Mac OS X.