We've mentioned GTD app Nozbe a few times before, but not since the release of their iPad app. If you're looking for a complete, easy-to-use task management app for your iPad and haven't checked it out, here's your kick in the pants to take a look.
Nozbe was originally a web-based application (still is), and creator Michael Sliwinski (also editor of Productive! magazine) has continued to develop amazing features into the web version. One of the more recent developments was Evernote integration, where you could tag projects in Nozbe with tags used on notes in Evernote, and have your Evernote notes show up when viewing projects in Nozbe. The latest version of the iPad app includes this functionality, along with improved file attachment handling.
The Nozbe iPad app is a full-fledged task manager which doesn't require a subscription to the web app to be fully-functional. In my opinion, though, the online synchronization and ubiquitous availability of your tasks on any platform is a major part of the appeal of this application. The iPad app is easy to use and easy to understand, offering full GTD compliance while not inundating you with choices and options that just make task management too complex. There's a version of Nozbe for iPhone as well, and they all sync together via the web application.
Among the many features of Nozbe that impress me are the myriad ways of getting tasks into your lists. From Twitter to plain text import, email, Dashboard widgets and, of course, the iPhone and iPad apps, finding a method that fits your workflow is an easy task. For the geeks, there's even an API that's pretty well fleshed out, allowing you to create your own means of adding tasks, checking them off, managing projects and more. I do long for a Mac desktop app, but I'm finding plenty of ways to make it just as easy to use the web version, and discovering that there are benefits to "working in the cloud" when it comes to task management.
If you're just interested in the iPad app, pick it up on the App Store for $14.99US, and check out the iPhone version for $4.99US. Subscriptions to the web version start at $7.50 per month (if you prepay a year). You can have a go at the free trial, too, and see if it's a good fit for you.