Where can I get these tools?

COPS:

V1.04, available for FTP from cert.sei.cmu.edu in pub/cops and archive.cis.ohio-state.edu in pub/cops.

Crack/UFC:

Crack v4.1f and UFC Patchlevel 1. Available from any major USENET archive (eg: ftp.uu.net) in volume 28 of comp.sources.misc.

NPasswd:

Currently suffering from being hacked about by many different people. Version 2.0 is in the offing, but many versions exist in many different configurations. Will chase this up with authors - AEM

Passwd+:

"alpha version, update 3" - beta version due soon. Available from dartmouth.edu as pub/passwd+.tar.Z

Shadow:

This is available from the comp.sources.misc directory at any major USENET archive (see entry for Crack)

TCP Wrappers:

Available for anonymous FTP:

cert.sei.cmu.edu: pub/network_tools/tcp_wrapper.shar

ftp.win.tue.nl: pub/security/log_tcp.shar.Z

Securelib:

The latest version of securelib is available via anonymous FTP from the host "eecs.nwu.edu". It is stored in the file "pub/securelib.tar".