Plan 9 from User Space's /usr/local/plan9/bin/upas/ 

-rwxr-xr-x  1 rsc  users   535 May 21  2006 isspam
-rwxr-xr-x  1 rsc  users  1084 May 21  2006 msgcat
-rwxr-xr-x  1 rsc  users   386 May 21  2006 spam
-rwxr-xr-x  1 rsc  users   282 May 21  2006 spambox
-rwxr-xr-x  1 rsc  users   390 May 21  2006 unspam
-rwxr-xr-x  1 rsc  users   286 May 21  2006 unspambox

Space Glenda

Copyright © 2005 Lucent Technologies, Russ Cox, MIT.
See license for details.