JWhoisServer is a small, fast, and highly configurable RFC 3912 compliant whois server written in Java and using RDBMS as a storage engine. It supports INET lookups (IPv4 and IPv6) and IDN domain names handling).
Release Notes: The dynamic JDBC driver loader has been fixed. Support for the CUBRID database and a dynamic plugin system for DBServerType have been implemented. A (beta) installer for Microsoft Windows is now available.