As we noted in our review of the latest version of Producteev last month, the service takes on a number of established task management services like Basecamp, Remember the Milk and popular mobile apps like Todo and Things. To use Producteev, users can use the company's online interface, iPhone app or simply send a tagged email message to Producteev. The service is available in a free version for individuals and in various paid versions for teams.

You can find our in-depth review of Producteev here.

Screencast Producteev Two from Producteev.com on Vimeo.

Geotagged Tasks

The most important and interesting new feature that comes with reQall Pro is its ability to assign a location to a task. You could, for example, assign the location of your favorite store to a shopping list and then reQall will organize your to do list accordingly.

Memory Jogger

One of reQall's distinguishing features is its 'memory jogger,' which looks at a user's situation (calendar, time, location), and then tries to alert the user to the most relevant items on the to-do list.

Pro users will also be able to send notes to reQall by email.

Free Transcriptions for All

Users who don't upgrade to the Pro version will still get free voice transcriptions (Jott, which offers a similar function, now charges for this feature), as well as an updated interface for contact management and the ability to add recurring events to reQall.

Verdict

Like so many other iPhone apps, reQall will surely benefit from the 3.0 firmware update once it is released in the summer. Without notifications, the app is only half as useful as it could be.

For now, however, reQall is still a very good task manager (though it might not suit everybody's taste), and its voice transcriptions and the ability to send and receive messages from a multitude of different locations (including IM and this Firefox plugin) set it apart from a lot of similar apps.

Whether this will be enough to steal users away from more established services like Remember the Milk remains to be seen, but if you aren't locked into a particular service yet, reQall Pro (you automatically get a free 30 day trial when you sign up for reQall) and its mobile apps are worth a closer look.

KonoLive's focus is on sharing to-do lists with a small group of friends or colleagues. Adding tasks and sharing your lists with other users is very easy and KonoLive offers everything from basic functions like establishing due dates to a live chat feature to discuss a certain item. KonoLive also integrates nicely with Google Docs and Box.net. Your lists are cached on your own machine, but also stored on KonoLive's servers. Sadly, though, you can't access your lists directly from KonoLive's web site.

One thing we don't like about KonoLive is that it automatically creates a new Box.net account for you. While we are big fans of Box.net, KonoLive does not inform you about this until you suddenly get a welcome message from Box.net. Also, the KonoLive window can not be resized, and the application seems a bit sluggish at times and does take up an inordinate amount of memory.

Tasck

In many ways, Tasck is the complete opposite of KonoLive. It has a minimalist AJAX user interface that allows you to perform a total of three actions: add tasks, delete tasks, and mark them as done. To mark a task as important, you simply capitalize the first letter.

Besides that, there really isn't much else to do - which might be a good thing, because the service lets you focus on your to-do list without getting in your way. However, it would be nice if you could re-order your tasks or edit them afterwards.

This afternoon the GMail team announced the addition of a new feature in the Gmail Labs - a Task Manager, or to do list. It's quite an elegant little feature, when it and the rest of GMail work. Below we've got a two minute video tour that shows how the feature works, in case Gmail is down for you and you can't see it for yourself!

Do you foresee yourself using this?