Downloading WebMap 1.0.6 for Mac from the developer's website was possible 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. This software for Mac OS X was originally designed by Matt Rajca.
From the developer:
WebMap makes it easy to create and edit sitemaps in the Sitemap XML format (that are compatible with services such as Google Webmaster Tool).
With WebMap, you can visually edit fields such as the URL, priority, and change frequency of web content. You can also delete entries and manually input new ones. In addition to manual entry, WebMap can also scan an entire website and add all of its internal links to your sitemap.
You may want to check out more Mac applications, such as ArcGIS Preview, which might be similar to WebMap.