One watch that recently caused a lot of excitement online was the TikTok

One watch that recently caused a lot of excitement online was the TikTok, a watch that uses an Apple iPod Nano as its internals. People seemed to flock to this device because of its slick design, and of course because it had a little Apple logo on the back.

Another watch that is currently being tested, called the Allerta inPulse, acts more like a computer than a timepiece. This device is different because its creators hope programmers and developers will “hack” the watch, creating new applications  or uses for it. The Allerta is expected to cost $150.

Eric Migicovsky, chief operating officer of Allerta, the maker of the new watch, said in an e-mail that he hopes people will use the device as an extension to their mobile phones, where the watch can offer a third screen of information without someone having to fumble for their phone in their pocket or purse.

Mr. Migicovsky said that installing apps on the new watch will be a simple process. “It’s possible to get up and running with inPulse within five minutes,” he said, noting that you don’t need to be a programmer or developer to take advantage of the apps on the watch, but watch owners will have to rely on this community to build new applications.

Some programmers are already using the new Allerta. One app offers the ability to control an iTunes music library from the watch. Another becomes an extension of a Blackberry smartphone and shows new e-mail messages and calendars on the phone through the watch’s display. And finally, a programmer recreated the popular videogame Doom, as seen in the video below.