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 and UpToDown.com, or the full version from PocketGear (if you want to pay in US Dollars) or Share*It! (if you prefer to pay using Euros, PayPal, cheque, wire transfer or any other method). There is also a variant with a PocketMac installer, for those who would rather use a Mac for installation. Plus, of course, good-old CAB files for devices with no desktop partnerships. If you don’t know which CAB file to use, chances are it should be the “ARM” version.