Monitor servers

[L.M.J]

Hi,

  I'm looking for a solution to monitor cpu/disk usage on several servers and
  it send me an email if there is an alert level reached.
  BUT I'm looking for a autonomous solution, I don't want a centralized web
  page interface who display status of all servers. I just need a program who
  monitor the server processes and send alert by email. So, I don't want
  Zabbix / Cacti / Nagios / XYmon / ZenOSS / Bijk...
  I could code it by myself, but I want something more reliable...

  I trough I could use webminstats plugin for Webmin, but I don't like Webmin
  so much...

  Any ideas ?

-- 
 LMJ
 "May the source be with you my young padawan"