Downloading mac2imgur 4.0 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. The program lies within Design & Photo Tools, more precisely Viewers & Editors. This free software for Mac OS X was originally produced by Miles. We recommend checking the downloaded files with any free antivirus.
From the developer:
mac2imgur is a simple and minimalistic Mac application designed to make uploading images and screenshots to Imgur quick and effortless. The application will listen for new screenshots taken by the built in screenshot functionality of OS X. Disabling this feature and changing other related settings is possible through the preferences menu.
You may want to check out more Mac applications, such as Vectorworks 2010 Viewer, DropImageURL or Polaris, which might be similar to mac2imgur.