Following up on my previous post on GTD on the iPhone / iPod touch I guess I should mention that things have moved on now. Some applications are ready for a mobile life, some not quite and others rather stay at home on your desktop. Which software should you load to get things done on your iPhone?
things
Cultured code offers their GTD application called things for the desktop and the iDevices with Software version 2.0. Unfortunately syncing is not yet supported but as their blog tells us they are working hard on the next version which hopefully supports over the air syncing. Currentl things for the iPhone is available at an early adopters-friendly price of 7.99 EUR / 9.99 USD at the iTunes App Store.
OmniFocus
Next is OmniFocus by the OmniGroup. They offer a more expensive GTD solution which consists of a desktop application and a iPhone app. The latter is available for 15.99 EUR / 19.99 USD at the iTunes App Store. When using the desktop beta version syncing is working already. The desktop version comes at a price of 79.99 USD. Not quite the cheapest application in the GTD world.
Inbox
Sadly midnightbeep software is working on an iPhone release of their Software Inbox at the moment (alpha version as of today). Currently working on version 1.5 of the desktop Inbox, which according to their weblog is the basis for any further development of the iPhone app and the long-awaited version 2 of the desktop application.
ToDo
ToDo is available from the iTunes App Store as well for 7.99 EUR / 9.99 USD. It syncs with two web-based services (toodledo and rtm). In case you use on of those services already ToDo might be just the rightthing for you. The price is reasonable as well.
iGTD
Another popular piece of software is iGTD for the Mac. Personally I never liked iGTD too much. Maybe that is because it just does not look very slick. When spending a lot of time with an application I want it to be beautiful. Besides: As far as I know there is no iPhone porting intention so far.
Some things still need to get done
In summary I would like to say that I am currently torn between using things and OmniFocus. Although OmniFocus offers sync already and has extra features like voice notes etc. I am a little reluctant due to the high price (approx. 100 USD for both apps plus optional mobileme subscription fees). Probably I will go for things and support the guys over at cultured code. Their software just looks and feels a little nicer and the price is better as well. Midnightbeep, I will keep my paid version of Inbox up and running, let me know when you get there. I will give Inbox a fresh spin then.
Now, go and read about the apps and get things done.
Audiobooks / Books on GTD
Oh, just in case you have no clue what this is all about? GTD is short for Getting things done by David Allen. You can get his book explaining all the principles as an audiobook at the iTunes Store (abridged / unabridged), or as a paperback from amazon.com / amazon.de and in german as well.
What are your experiences?
Have you tested these applications as well or any others which did not get a mention here? Feel free to comment and let us know which is your favourite GTD app.

RSS
For implementing GTD you might try out this new web-based application:
http://www.gtdagenda.com
You can use it to manage your goals, projects and tasks, set next actions and contexts, use checklists, schedules and a calendar.
A mobile version is available too.
Hope you like it.
Thanks Dan. The online trouble with web-based applications is that you might not have online access withthe iPod at all times. Thanks for the addition to the list!
Oh, it‘s really an agony of choice.
RememberTheMilk in sync with ToDo on iPhone/Touch could be another interesting alternative: http://wordpress.macoholic.de/?p=2747 (German review)
On the Mac I use Things. In bigger projects I miss the option for sub projects. That’s where OmniFocus is unbeaten. But I don‘t make friend with it. Things has a far superior Mac feeling.
I bought Things for iPod Touch. But without syncing it‘s not very useful for me. I really look forward to the announced version with syncing support.