Version 2 of Arial Unicode MS

A really good quality font file, from Microsoft, it comes with MS-Office-2000, it is freely available for download from many sites. It is huge and contains big collection of characters.

Really useful for displaying CJK symbols. Example (it uses Perl+Tcl/Tk and heavily uses said font):

RS: An alternative is Bitstream Cyberbit, which used to be free, and now is less so - but google for "cyberbit download" for ways to get it. It works great with Tk on my Win95 box and iPaq - screenshot at i18n tester