<p>Any good converter for GB, Big5, Unicode?</p>

<p>Convert GB to Unicode, Unicode to GB, Big5 to Unicode, Unicode to Big5, GB to Big5.</p>

iconv should be able to do the job.  It's part of the GNU C Library.
```
```
http://en.wikipedia.org/wiki/Iconv
http://www.gnu.org/software/libiconv/
```
```