Hictu is a micro-blogging service similar to Twitter and Jaiku, but it also allows audio and video to be added as well. It is run by the folks at Abbeynet, an Italian VoIP/telecom operator.

But now, with their partnership with Jajah, you can take it a step further. You can go into someone’s Hictu profile and, if the person has a Jajah account, you’ll see a green call button. Click on that, and the call is set up through Jajah. Calls are charged at the normal Jajah rates to the receiving party’s Jajah account.

It should be noted that Jajah isn’t the only service supported here, as Abbeynet’s own VoIP calling service is supported, including Sitofono.

Jajah operates on an honor system that allows you about 1,000 minutes per month of free calls because other Jajah users pay to use the company’s premium services (such as business accounts, calls to non-Jajah users and some foreign calls). Go over that limit, and Jajah will ask that you purchase some premium services; if you don’t, you may be cut off (and remember, they have your phone number).
Pro: Mac-friendly, with a plug-in that connects Jajah calling with the OS X Address Book, plus an Outlook plug-in that is in beta.
Con: Ceiling on free calls limits usefulness for high-volume callers.

Jajah offers the chance to make entirely free PC-to-PC VoIP calls and a limited number of free calls to and from landline phones. You visit Jajah’s Web site, then enter your phone number and the number you want to call. Your phone rings and you answer, after which your recipient’s phone rings and Jajah completes the call.