Any library with string encoding/decoding support?

[FreeSlave]

iconv as library is under LGPL. iconv as utility is under GPL. 
Note that iconv is not portable even on Linux, since different 
distros may have different implementations.

Qt is not the case because it's unstable with D. It's also 
redundant dependency. And as far as I know Qt uses 
platform-dependent functions like iconv on Linux and 
Windows-specific functions to work with encodings on Windows.