Knapsack 2.2.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this Mac application is Outer Level Corp. The most popular version of the application is 2.2. The program is included in Lifestyle Tools. This app works fine with Mac OS X 10.5 or later.
From the developer:
Knapsack, the personal travel planner for Mac OS X Leopard.
Knapsack's new world map let's you view your trip's destinations at any level of detail. You can get an overview of your entire trip across countries and continents or zoom in to street level to see all the parking lots near your hotel.
The new Map Search feature in Knapsack 2 helps you quickly find places, addresses, and even points of interest anywhere in the world.
You may want to check out more Mac applications, such as Bugdom 2, which might be similar to Knapsack.