PingScan scans networks via ping for reachable hosts. It does DNS lookup and checks for correct forward/reverse entries. You can enter network adressess in CDIR notation or give start and end adresses.
You can download it from the following link: https://packetstormsecurity.com/files/download/14219/pingscan-1.2.tgz
Source: https://packetstormsecurity.com/files/14219/pingscan-1.2.tgz.html