Odms

ObjectDB for Java/JDO a powerful yet compact Object Database (ODBMS) for Java, written entirely in Java, and compliant with the Java Data Objects (JDO) standard developed by Sun. ObjectDB for Java/JDO is designed to handle efficiently databases of various sizes, ranged from a few KBs to hundreds... Platforms: OS/2, BeOS, Palm OS, Windows, Mac, *nix, Windows CE

deimos project consists of some platform independent libraries. The deimos project provides some platform independent libraries which contain a reference memory allocator (garbage collector planned), virtual filesystem (Unix sockets, HTTP, etc), configfile management, and a clean build system... Platforms: *nix