I'm configuring a new Linux server install and was just wondering if anyone has a list of useful general-purpose tools that they always install on Linux server boxes as a matter of course? I've already installed the following packages and tools:

* vnstat
* maven2
* subversion
* perl
* php
* java
* apache2
* mysql

Any other generally useful packages that you would recommend installing? I'm looking for things in the category of "generally useful utilities with no application-specific value", such as vnstat. Things that provide useful tools for monitoring, testing, troubleshooting, etc..