Here is a list of usefull small scripts I wrote:
calc - perl commandline calculator with history
cisco-mode.el - emacs syntax highlighting for cisco configs
cmail - CGI mail tool
leo - commandline fronend to http://dict.leo.org
mdu - show Mysql disk usage
nstouch - increment SOA serial number in dns zone file
phorumail.pl - mail backend for phorumail
scipfire - personal firewall for linux (iptables)
server-firewall - firewall for linux servers
stat - display file informations
takeoverd - failover software
uback - backup script
ush - UDP backdoor
xrun - X11 "run..." tool to execute arbitrary commands
xslt.vim - VIM syntax highlighting for XSLT
obfuscated perl - my obfuscated contribution
viwl - editor wrapper with version control integration
shrotate - logfile rotation tool
zwirbler.py - randomizes letters in words
Perl Nagios Cluster Plugin - summarizes the results of multiple nagios checks into one result.
Counterstrike Source Scripts - scripts to start and maintain counterstrike source and teamspkeak server.
All software downloads are available here.