i2Librarian 1.0.0 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. This free Mac application was originally created by Unsanity, LLC. 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 application is included in Internet & Network Tools.
From the developer:
There is also a free Mac OS X application called i2Librarian that makes uploading books and dictionaries to your iPhone (or iPod touch) a breeze. Any dictionary file placed with i2Librarian or via the built-in FTP or Web server will be used by i2Reader to look up word definitions - both in a separate tab and right in the book text. Any StarDict style dictionary will work.
You may want to check out more software for Mac, such as BitTyrant, iTorrentFlux Uploader or kget, which might be related to i2Librarian.