ISO-8859-* to UTF-8 conversion

Hi. Is there an easy way to convert between the iso-8859-* encodings to the UTF-8 ? E.g is there a command line tool that takes as arguments an input file say text in iso-8859-7 (Greek) and outputs the same file converted to UTF-8. If not what is the easiest way to do this? BTW as of SuSE 9.1, has the default encoding changed to UTF-8 ?