MiniPauker is a flash card based learning application for mobile devices and handhelds. It is based on the leitner cardfile system and is compatible with Pauker (http://pauker.sf.net, the desktop version of this software). MiniPauker uses a combination of ultra-shortterm, shortterm, and longterm memory. You can use it to learn all the things you never want to forget any more, like vocabulary, capitals, and important dates.
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.
db4o is an object database for Java and all .NET environments. Its features include ACID transactions, automatic class schema recognition, query-by-example, a S.O.D.A. object querying API, native queries, LINQ support on .NET, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.