I like spong. I've used it for years and years. Here are some bits and pieces that I'm tracking down as I beging to use spong as a network monitoring system for PersonalTelco.
Spong homepage: http://spong.sf.net/
Spong list archvies: http://www.geocrawler.com/lists/3/SourceForge/3728/0/
Old Spong list archives: http://monsters.org/pipermail/spong/
- More spong plugins: