PackRat, the killer syncing and offline Backpack client that does even more than Backpack itself, has reached an official 1.0 status. After more than a year in the oven, developer Rod Schmidt posted an understandably excited announcement on his company's blog, complete with some new features that round out PackRat's abilities. New in v1.0 are Growl reminder notifications, printing pages as well as searching them (via the Find command), a revamped 'add item' dialog, contextual menus and a full-on Help file. Of course, you can't forget about features that are already baked in, like Reminder creation, re-ordering items within and between lists on a page and automatic syncing.
As a thoroughly satisfied customer, I highly recommend PackRat if you've been looking for a way to take your Backpack account with you. A fully-functioning demo limits you to editing 4 pages is available, while a license costs $24.95 from infiniteNIL.