LearnKana is a program to help you memorize the Japanese "Kana" syllabries. Only the Mac OS X/Win version is tested, all others provided as-is. The Program is licensed under GPL and developed with RealBasic 5 and from 0.2.0 onward with RB2005. Most probably needs Japanese language display support from operating system. Mac OS X includes one built-in, Windows doesn't, so at least one needs to be installed if using the windows version.

Mac OS X 10.2-
Win9x/2k/XP
Linux/x86(GTK2+)