WWW protectors

[Mark Le Vea <mark () cmr gov>]

I'm looking for pointers to packages that protect web servers.
So far I've found:

TIS's ForceField
http://www.tis.com/support/ffsupport/forcefield/noframes/ffguide/index.htm

Siemen Nixdorf's TrustedWeb     
http://www.trustedweb.com

TIS's WebStalker Pro (ex-Haystack 
Lab)http://www.tis.com/prodserv/stalkerproducts/webstalker/index.html

Are there any other products out there that I have missed?

Thanks,

Mark