You could have downloaded OptiSpider 1.0 for Mac from our software library for free. The actual developer of this free software for Mac is Left Side Systems, LLC. The most popular version of the program is 1.0. The software lies within Developer Tools, more precisely IDE.
From the developer:
OptiSpider™, assists customers with the development of “search engine friendly” websites.
OptiSpider™, assists customers with the development of “search engine friendly” websites. This tool resulted from the firm’s research and experience with consulting clients that illustrated that a large percentage of search engine ranking problems were tracable to poor internal design.
You may want to check out more Mac applications, such as PowerGlot, ChIDE or flex sdk 3, which might be related to OptiSpider.