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.
Originally named Sync4j, the Funambol Mobile Application server includes a suite of tools to develop, deploy, and manage mobile projects. It includes push email functionality and is a certified implementation of SyncML (OMA DS/DM standard). It includes a mobile application server with connectors to SQL relational databases, Microsoft Exchange, Lotus Domino, and SugarCRM, applications for Outlook, Windows Mobile PocketPC, BlackBerry, Palm, and iPod for synchronizing address books and calendars, and a gateway for supporting mobile email. An SDK and an OMA DM server for remotely managing mobile devices are also included.
PicoGUI aims to be a complete GUI environment for handheld computers and other embedded systems. It uses a client/server model, like the X window system, but while an X server is given raw drawing commands, the PicoGUI server integrates a widget set, making PicoGUI clients small and efficient. PicoGUI also has the goal of allowing client/server connections over a variety of mechanisms. It is most commonly used with Linux, but is designed to be portable to any OS. PicoGUI has a variety of video and input drivers which allow it to interface with the Linux framebuffer device, SDL, the X window system, and several other devices.