There are two versions of Crippin available – a full version which allows passwords of up to 255 characters, and a free version which uses very short passwords (it truncates them to 2 characters). The free version provides fully functional file compression, but only limited security (enough to prevent access by toddlers and grannies, but not professional hackers).

You can get the free version from various shareware sites, including Pocket PC City, or the full version from PocketGear. There is also now a variant with a PocketMac installer, for those who prefer to use a Mac on their desktops.

Free Version   Full Version   Free Version (PocketMac) Full Version (PocketMac)