MultiDom Pro (Free)
MultiDom Pro is a very fast, cross-platform, highly configurable parallel domain search engine, capable of searching for multiple names simultaneously. Supports .name, .biz, .info, .tv, .me, .us, .dk and 200+ more. Customise appearance and functionality with ease - also includes a comprehensive online admin area where new TLDs can be added, and various appearance and default performance configurations are maintained with ease. Compatible with TUCOWS OpenSRS. For the addition of a 'synonym engine' to suggest alternative name and TLD combinations and a Cart solution, please see MultiDom Pro Cart, which is also Free. Compatible with all Linux, Win32 and FreeBSD platforms.