I found one in the web
http://people.w3.org/rishida/scripts/uniview/
However, if we want to visualize unicode in scalation, some additional
support must be taken into consideration.
(1) For browser, svg format must be supported.
"As of 2010, all major desktop browsers, and many minor ones, have
some level of SVG support, except for Internet Explorer. Other
browsers' implementations are not yet complete;" (from wiki)
(2) For desktop application, unicode font needs to be installed, e.g.,
BabelPad for Windows.
(3) Eclipse may support unicode, but how to integrate scalation within
Eclipse?
Another step would be to narrow down to a specific area and try to
work on a small subset of unicode since Unicode includes huge
characters.
These are just my two cents.