Wrike Launches: Launching today, this collaborative task-managing service demoed at LeWeb3 conference in Paris this week. In short, Wrike lets you assign tasks among members of a group, but a bit more usage reveals that some of the proposed features aren't yet live.

Ajax13 Launches Web-based Powerpoint: Most readers probably haven't been with Mashable long enough to remember the AJAX craze of last year - be thankful. Now Ajax13 has rolled out another application that aims to bring desktop apps to the web using this javascript technology. This time, they've served up a presentation tool called ajaxPresents, which resembles Powerpoint to a freakish extent. In truth, though, the benefit of these web-based solutions will be the social aspect (collaborating with others), rather than creating exact replicas of desktop apps. (via)

Spresent: Yet another new web-based presentation tool that's getting some buzz. Spresent is built completely in Flash, and offers the ability to embed your slideshows on other sites via a Flash widget. Not bad at all. For those too lazy to sign up, there are some sample videos over on YouTube.

Hobnobster: Not a great name, but this newly-launched mobile social network and bookmarking service from FeedText isn't too shabby. Create a profile, send messages and bookmark profiles you fin interesting. As with Zemble, and most other mobile social networks, Hobnobster relies on text messaging. Incidentally, Zemble is about to launch Zemble Communities and a "Santa" promotional campaign (text message your Christmas wishes to Santa) in the next few hours.