I want something that's quick to set up, doesn't have a lot of dependencies, outputs pretty graphs, and is easily customizable (e.g. calling external scripts that simply output a numerical value).
I've worked with Munin and Zabbix before, but feel that they're both a bit too involved for my needs (especially Zabbix), and am wondering what else is out there. I don't want to use something low-level like rrdtool because I use it rarely enough that I keep forgetting the syntax.
My plan right now is to use this to collect some stats on the usage of a website, by graphing certain values from SQL queries every few minutes or so. Maybe there are even tools built specifically for this kind of database usage analysis?