The 1.0 version of NSData for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version of the program is 1.0.
The application lies within Developer Tools, more precisely Debugging Tools. 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 free app is suitable for Mac OS X 10.8 or later. The actual developer of this free Mac application is ATFinke Productions Inc.
From the developer:
NSData is a great tool for any developer testing custom file types with NSData. With this simple application you can unarchive NSData files and display their contents. This application has a simple and easy to use application. The program has only 2 buttons.
You may want to check out more Mac applications, such as RunJSRun, File'Hash or APN Tester, which might be similar to NSData.