Looking for a simple system

I'm looking to source a very simple bug tracker like system. With the ability to add, update and edit bugs/issues/whatever and view a complete list of current bugs/issues. A page with a table which displays the entire database, another page which allows someone to add to the database, a page which allows you to view a bug in more detail and update it.  I want it to be as small and simple as possible, I've tried making it myself but I've come across so many problems as I'm not very good with PHP. So ideally the system would be easily customisable through the PHP files.

 

I've had a good look around google and haven't found anything suitable, everything is either far too huge and hard to install or customise.

 

Any ideas?

http://en.wikipedia.org/wiki/Comparison_of_issue_tracking_systems

Thanks but they are all far too complex and most of them aren't downloadable/free. All I need is a very simple system, any more ideas?

http://trac.edgewall.org/

This is the biggest one currently out there. It can be very simple, or it can be very advanced if you add a lot of plugins to it. 

Haven't tried it, but recently came across Chaw. Hasn't been updated recently, but it sounds nice.

MantisBT is very simple, quick, customisable and matches your other requirements. It's not the sleekest looking software, but works well from my experience.