Windows only: Attribute Changer, a free right-click utility, gives you total control over everything reported by a file to your system. Right-click one or many files and choose "Change Attributes," and you can enable or disable read-only status, hiding, indexing, and even NTFS compression. You can change the file's date of creation, modification and last access, and tweak a photo's time of taking. Great for those files that get erroneously labelled as made on Jan. 1, 1969, and always get lost in searches, or fixing date issues with a photo collection. Attribute Changer is a free download for Windows systems only.