Toolbox for Keynote gives you access to a comprehensive collection of sample data which you can use when working on your Keynote projects. The utility is packed with quality sample files, brings you a complete help manual, and features a very intuitive interface.
You have access to various types of sample files, such as layouts, infographics, themes, etc. Just select the data category and buy or download the file you need for your Keynote project. You can also use the built-in search tool to immediately find the file you're looking for.
Not all of the listed project sample data are available for free. Instead, you need to make an in-app purchase to unlock all content. The acquiring price is quite reasonable, especially if you plan on working with the utility often.
A good thing is that you can preview sample files before purchasing and/or downloading them to your Mac. This features comes in handy as it lets you know exactly what you're paying for and/or downloading to your local directories.
Hence, it's definitely worth giving this Mac tool a try, especially if you're working with Keynote often.