launchd for znc IRC bouncer: http://henrik.nyh.se/2009/02/using-the-znc-irc-bouncer-with-os-x-and-iphone

name.henriknyh.znc.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>Label</key>
  <string>name.henriknyh.znc</string>
  <key>Program</key>
  <string>/usr/local/bin/znc</string>
  <key>RunAtLoad</key>
  <true/>
  <key>StartInterval</key>
  <integer>300</integer>
</dict>
</plist>