7-Zip One of the best, free, and most efficient Windows archive and unarchive utilties around. Support quite a few formats as well.
Links Page These and more of our favorite links can be found on the Links Page.
ApplePi-Baker V2 Tool to backup and restore external disks, originally designed for Raspberry Pi use, but suitable for many other purposes.
Allowing compression, shrinking IMG or expanding IMG (Linux partitions), etc.