Eraser - Open Source Data Deletion

Eraser is an advanced security tool for Windows which allows you to completely remove sensitive data from your hard drive by overwriting it several times with carefully selected patterns. Eraser is currently supported under Windows XP (with Service Pack 3), Windows Server 2003 (with Service Pack 2), Windows Vista, Windows Server 2008, Windows 7 and Windows Server 2008 R2. Eraser is open source software and its source code is released under GNU General Public License.

Darik's Boot and Nuke

DBAN - Open Source Data Deletion Tool

Darik's Boot and Nuke (DBAN) is an open source erazer software designed for consumer or home use. Also known as DBAN; it is a great tool for wiping the contents of a computer you're selling or as a way to ensure you've eradicated all viruses and spyware before doing a clean OS install. However, users should be aware of its limitations, especially for larger environments such as a company or organizational network.

Testdisk- Open Source Data Recovery

TestDisk is Open Source software and is licensed under the terms of the GNU General Public License. TestDisk is a powerful data recovery software! It was primarily designed to help recover lost partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally deleting a Partition Table). Partition table recovery using TestDisk is really easy.

OpenEMM - Open Source Mailing Softwares

OpenEMM is a feature-rich web-based enterprise application for email marketing, newsletters and service mails (transaction mails and event or time triggered mails). OpenEMM offers a great user interface, sophisticated bounce management, link tracking, lots of graphical realtime statistics, a CMS module and a scripting feature to implement individual tasks. OpenEMM is the first open source application for e-mail marketing. Its code base has been developed since 1999 and is used - as part of the commercial software product E-Marketing Manager (EMM) - by companies like IBM, Daimler, Siemens and Deutsche Telekom.