I have an account on a shared server with Cpanel. Can anyone recommend a good stats tool that I can install on my server? I would like to know stuff like uptime, average downtime per month and server load.
Are you looking for stats tools or monitoring ones. They are different tools.
For stats tools I reccomend you using log based tools like webalizer etс. For monitoring - use out of your server located - something like hosttracker or so.
If you're looking for a stats tool to monitor number of visitors, etc. there is AW-stats as mentioned. Usually it is included with a cPanel-based account.
Just be aware that for instance the list of which countries the visitors come from is totally useless - such a function is based on a list of IP-addresses and needs to be updated regularly. AND I don't think the AW-stats IP list has ever been updated...