Foremost is a console program to recover files based on their headers, footers, and internal data structures. This process is commonly referred to as data carving. Foremost can work on image files, such as those generated by dd, Safeback, Encase, etc, or directly on a drive. The headers and footers can be specified by a [...]

Bootchart is a tool for performance analysis and visualization of the GNU/Linux boot process. Resource utilization and process information are collected during the boot process and can later be displayed in a PNG, SVG or EPS-encoded chart.
The boot process is modified to start the boot logger (/sbin/bootchartd) instead of /sbin/init. The boot logger [...]

The Ubuntu developers are moving very quickly to bring you the absolute latest and greatest software the Open Source Community has to offer. Hardy Heron Alpha 3 is the third alpha release of Ubuntu 8.04, and with this new alpha release comes a whole host of excellent new features.
Note: This is still an alpha release. [...]

FSlint is a toolkit to clean filesystem lint, like duplicate files, badly named paths, and broken symlinks for example. It includes a GUI as well as a command line interface. For example, one form of lint it finds is duplicate files.
[ http://www.pixelbeat.org/fslint/ ]
Some of the diferant kind of lints FSlint finds include, Duplicates:

Installed packages:

Bad names:

Name [...]