iGTD takes some concepts from Getting Things Done methodology and makes them easy to understand and use in your every day life. But it's definitely not limited to the GTD concept - you can really use it the way you want.
• Nested contexts and projects with a unique powerful chooser
Divide your tasks in nested contexts and projects. Browse them quickly, apply filters, perform searches, create smart folders... and get things done!
• Killer features for adding tasks
Add tasks from many external applications - Safari, Firefox, Mail, Entourage, Finder, NetNewsWire, Microsoft Word, TextMate - just to name a few. Integrate with MailTags plugin for Apple Mail. Create new items using smart Quick Add and Quick Type In windows. Use Quicksilver. E-mail your tasks to yourself and let them be imported to iGTD automatically. Or simply drag'n'drop your web links or files to iGTD.
• Store your reference items in the archive
Store your reference items - interesting web links, links to local files, thoughts or comments - in the archive section of iGTD. Categorize and tag them in order to find the right item as quick as possible!
• Export your tasks to HTML, Excel or text files
With a few mouse clicks or key hits you can export your tasks to HTML files, CSV format (for Excel) or plain text files.
• Awesome keyboard support
I can't imagine a good app without an good keyboard support. That's why iGTD has it all - you won't event think about moving your hands away from the keyboard.