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).
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.