The 'idnkit' is an open source, BSD-like licensed software that provides functionalities about Internationalized Domain Name processing standardized at IETF. Major features that idnkit provides are as follows. * libidnkit Core library for IDN processing. * libidnkitlite Light Weight library for IDN processing. (UTF-8 only) * idnconv DNS zone / configuration file encoding converter. * runidn / idn wrapper Dynamic link resolver library for UNIX / Windows. * BIND 9 patch IDN enhancements for BIND 9 DNS lookup tools. WWW: https://www.nic.ad.jp/ja/idn/idnkit/download/