Hello,
just if not announced before. here something for linux (I tested everything in Ubuntu):
- Screensaver: kanjisaver, kannasaver (see http://ubuntuforums.org/showthread.php?p=1505779 for details)
- Dictionary (based on EDICT): gjiten http://gjiten.sourceforge.net/ (for GNOME)
have fun,
matane,
パブロ