Ed's Chicago 1.0 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. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software lies within Theming Tools, more precisely Screensavers.
From the developer:
Ed's Chicago Slidesaver is the first in a series of 3 Chicago screen savers, each featuring 20 photos from the work of a different photographer. This series was set up for the sole purpose of assisting the widow and children of a former coworker, Sam Martin, who died of cancer, January 15, 2005. It is a labor of love.
You may want to check out more Mac applications, such as Driver's Ed - 50 States, 0xED or yEd, which might be similar to Ed's Chicago.
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