Sans serif font?
Let's limit it to free fonts.
The URW Fonts bundle contains URW Gothic L, which is a Century Gothic clone.

Look here:
http://www.artifex.com/downloads/
There are some others in there you might like, including Nimbus Sans L, a Helvetica clone.
Similar clones can be found in the TeX Gyre bundle, which may contain more of the character set you need. Go here:
http://www.gust.org.pl/projects/e-foundry/tex-gyre/
Another nice free general-use sans-serif font I like is Droid Sans:

You can download the droid fonts here:
http://damieng.com/blog/2007/11/14/d...oogle-ascender
There are a lot of other free sans fonts to choose from (if you know where to look): Deja Vu Sans, FreeSans, Liberation Sans, Luxi Sans, CM Bright, Bera Sans, etc. For something wilder, look at Jura. If you want to go really wild, check out the hundreds of decorative fonts provided for free by
Larabie Fonts.
No clue whether these have the special characters you need.