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OEBackup allows you to perform a full or selective backup of Outlook Express' critical files including mail folders, newsgroups, address book and identity settings.

7-Zip is a file archiver with a high compression ratio. Supported formats: 7z, ZIP, CAB, RAR, ARJ, LZH, GZIP, BZIP2, Z, TAR, CPIO, RPM and DEB.

Easy Cleaner is a free, effective registry cleaner. As a bonus, it will detect duplicate files and help you clean up temp files to make more disk space.