HAL/C++ is a library using dbusmm to access the HAL daemon. The library is not a wrapper around libhal and libhal-storage, but rather a reimplementation using dbusmm to communicate with the HAL daemon. Even though it is modeled after the official libhal and libhal-storage, it does not aim at complete adherance to the original API. The library is application-oriented, so for now, features that would only be useful to system-level applications or daemons, or HAL addons, are not being implemented. However, some of these features are mostly conveniences in the original libhal, and can be emulated even with the existing API.
Portable Linux is a tool that lets you create bootable USB and removable drives using popular Live CDs based on Casper (like the Ubuntu family of distributions). It sports some unique features. The live setups it creates let you use the remaining disk space on your USB drive to store and transport files between computers, as usual. If your distribution supports persistence, the files and settings you edit on your live Linux distribution are persisted across reboots. Finally, you can access the area used to store your files from within your Linux distribution.
File-Find-Object provides Perl programmers with an object-oriented alternative to the core File::Find module for traversing a directory structure, which has some serious interface limitations. As opposed to File::Find, File-Find-Object can be instantiated, can be interrupted in the middle, has an iterative interface, and can also return results as objects.
BleachBit deletes junk to recover disk space and maintain privacy. It rids your system of old junk including cache, Internet history, temporary files, unused locale files (better than localepurge), logs, and cookies. Designed for Linux systems, it wipes clean 50 applications including Adobe Reader, Bash, Firefox, Flash, OpenOffice.org, Opera, Real Player, Skype, and more. It shreds files so that they cannot be recovered, and it wipes free disk space to hide insecurely deleted files. It offers both a simple PyGTK GUI and a command line interface for automation.
Hot Copy creates an instant point-in-time snapshot of any block device while the system is running without interrupting applications or requiring the use of LVM. As block level changes are made to the real device, hot copy makes a backup copy of the changed block. The changed blocks are efficiently stored in unused space on your hard disk. These stored changed blocks maintain a point-in-time snapshot and space is only needed when you make changes to the real device. You can even write to your snapshots.
fsarchiver is a system tool that allows you to save the contents of a filesystem to a compressed archive file. The filesystem can be restored on a partition that has a different size, and it can be restored on a different filesystem. Unlike tar/dar, fsarchiver also creates the filesystem when it extracts the data to partitions. Everything is checksummed in the archive in order to protect the data. If the archive is corrupt, you just lose the current file, not the whole archive.