Sprint Lite is an OS fingerprinting tool which is similar to Queso except that it is written in Perl and is still actively being developed. It only sends 1 syn packet, to avoid IDS detection. Requires Net::RawIP.
You can download it from the following link: https://packetstormsecurity.com/files/download/25158/sprint-lite-0.2.tgz
Source: https://packetstormsecurity.com/files/25158/sprint-lite-0.2.tgz.html