deletes junk files to free disk space and improve privacy
BleachBit frees disk space and maintains privacy. Cleans cache, Internet history, temporary files, logs, cookies, Firefox, Google Chrome, Flash, Windows, Linux, and more. Downloads are at www.bleachbit.org and source code is at GitHub.
Secure wiping/shredding of free disk space with many methods
...Additionally, WipeFreeSpace can finalize wiping the filesystem by writing blocks of zeros, which is friendly for sparse files, virtual systems and other places where zeroed-out space is not physically allocated.
See the project homepage https://wipefreespace.sourceforge.io and the project Wiki in the menu above.
To prevent clear-text data from being left on the drive in the first place, you can use LibSecRm (https://libsecrm.sourceforge.io), which wipes the data on-the-fly.
LibSecRm (LIBrary for SECure ReMoval) is a set of replacements for these standard C functions which cause data removing from files.
The data is first securely wiped on-the-fly, to protect the user's privacy, then the original functions are called.
There is NO NEED to rebuild your software, because LibSecRm is a pre-loadable library, meaning you just need to RUN the software with LibSecRm loaded.
LibSecRm is also a development library.
FOG is a free open-source cloning/imaging solution/rescue suite. FOG can be used to image Windows XP, Vista, Windows 7 and Window 8 PCs using PXE, PartClone, and a Web GUI to tie it together. Includes featues like memory and disk test, disk wipe, av scan & task scheduling.
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Darik's Boot and Nuke ("DBAN") is a self-contained boot image that securely wipes hard disk drives (HDDs). DBAN is appropriate for personal use, bulk data destruction, or emergency data destruction for HDDs, but is not recommended for solid-state drives (SSDs), sanitization that requires auditable compliance documentation, or technical support.
WipeOut is secure data deletion method & application. WipeOut method is designed to be fast and secure. WipeOut also has many sub schemes for faster (but not weak) wipe process .
KillDisk is a program written in python for Unix based systems for wiping a hard drive. It can wipe a hard drive using all zeroes or random data, and as many times as you want to specify.
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SimpleDriveWiper is a very simple command line tool that allows you to wipe the free space of a drive/partition. Its purpose is to obfuscate the residual of data that remains even after attempts have been made to remove it. For Windows,Linux and Mac.
ShredBitz is a free and simple file shredder tool that can wipe selected files from any hard disk drive. ShredBitz is written in the java programming language and uses a custom written algorithm for shredding.
ShredBitz is a very powerful tool.
DWIP is short for Disk Wiping and Imaging Tool. This tool is being built for Mississippi State Universities National Forensics Training Center for use on a live cd to give out to it's students.
Delete-Temp is a utility that will delete temporary files and/or directories from your computer or a Web server via Secure Shell (SSH). The newest version now has support for non-Windows users, among other changes and improvements.