To find the ideal GTD® software, you should start with this rule:

Read "Getting Things Done" first. 

If you haven't read the book, do so.  GTD® isn't (just) a set of techniques.
The book is a few bucks, just buy it and read it.
 

If you've read the book and you've worked with a manual system for a while, then this is a great place to start looking.  You've built a pattern of behavior and you simply need a tool that matches how you work.  On this website, we'll give you a good overview of the options out there.  Because each application is different, as each person is different.  Use the search bar above, or check out our favorites:

Windows:

  • ThinkingRock - free, follows GTD® pretty strictly.  That's great for beginners who want to learn the GTD® ropes, and many old-timers swear by it. 
  • Tudumo - phenomenal user interface - simple, but effective.

On the Mac, you can't go wrong with:

  • Things - offers tagging and team features, imposes less structure than other applications.
  • OmniFocus - more accurately represents GTD, but has more structure and a bit of a learning curve.  Omni are known for great software.

On the web:

  • VitaList - has many, many users and a clean user interface.
  • Tracks - many gtd-specific features.  Tracks can be installed by you but there are hosted versions.
  • MonkeyGTD - inspired by tiddlywiki, has a rabid following of users!