AncientScripts.com
"A compendium of world-wide writing systesms from pre-history to today."

Omniglot
Information on writing systems and languages, both historical and fantasy. Also has some fonts.

The Metaverse
Home of the Language Construction Kit.

Nihongo o Narau/Learn Japanese
A nice introductory site for learning the Japanese language.

Kanji Cafe
An online tool for learning Kanji.