TabifyIndents 1.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X is an intellectual property of Hiroki Ishiura. The software lies within Developer Tools, more precisely IDE. We recommend checking the downloaded files with any free antivirus.
From the developer:
TabifyIndents for Xcode by Hiroki Ishiura adds two features Tabify and Untabify to Xcode Source Editor.
Tabify command replaces space characters to appropriate numbers of tabs without changing indentation width. Also, Untabify command is vice versa.
You may want to check out more Mac applications, such as Objective-Basic or RapidSVN, which might be related to TabifyIndents.