I just downloaded an application called SipPhone, $6.99. It allows to you an existing SIP account on your iPhone to make calls with Wifi. Similar to Skype (Which isn’t sip based) you can use a voip service like Vonage on your iPhone.
There are many VOIP providers Vonage. Voicestick, PhonePower, Callcentric, Gizmo5, etc. If you get this app and are connected to WiFi you will be able to make and receive calls. So if Vonage offers you free or discounted international calling this is an extension of home account.
I am …

The folks over at airlinepilotcentral.com have created a new site dedicated to aviation related applications for the iPhone. The site is called Airline Pilot Apps. When you get a chance head over there and give it a read. http://airlinepilotapps.com/ The site is very new and I don’t think it has been officially launched yet. Look for more great things in the future.

This article is biased towards the iPhone but sites/links which will work on all platforms have a * next to them.
If you don’t want to pay for a weather application like Fizz Weather for your phone head to the internet for the next best thing. There are a variety of sites that have dedicated phone friendly data.
Weather Underground – offers great radar, metar, and general weather information. Looping radar works great on the iPhone.
iPhone – http://i.wund.com/auto/iphone/
* Any mobile phone – http://mobile.wunderground.com/
* PICBrief.com – offers a wide variety of information including …

Jajah adds calling and texting to iPod Touch
If you own an iPhone or Touch and would like to make calls via WiFi check out this new application from JaJah.
Read the article on CNET http://news.cnet.com/8301-1035_3-10157705-94.html?tag=mnco
Visit the Jajah web site.
You may also want to check out Truphone to use Skype on your iPhone or touch.

Skype has just release a beta version for standard mobile handsets. So if you don’t want to lug around a larger windows mobile phone this solution may be for you. The Skype web site lists Nokia, Motorola, Samsung, and Sony Ericsson as compatible handsets. Check the Skype web site for complete details. This is a great development and could greatly enhance your ability to use Skype while on the road.
According to Skype: Skype for your mobile beta means you can call your contacts whenever you need to – no …

What is Palringo? Palringo is a novel Instant Messaging program that runs on a variety of phones and PCs. Palringo allows you to instantly exchange text, photos and vocal IMs with individuals or groups. It supports MSN, ICQ, Yahoo Messenger, GoogleTalk, AIM, …

I posted this in a Tilt related message forum and figured I would add it to my blog.
So I consider myself a bit of a guru when it comes to GPS applications. I use Google Maps, Microsoft Live Search, RunGPS (A great fitness GPS application, Run.GPS) and TomTom. I am using the Taster Version of TomTom and it is really idiot proof and works very well. If I was to purchase an application this would be the one. For example, last night I changed directions from one contact to another …

Article about Fring! Coming soon. Want to do lots of things on your phone with a single application. Check out Fring.
From the Fring Website:
fring™ is a mobile internet service & community that enables you to access & interact with your social networks on-the-go, make free calls and live chat with all your fring, Skype®, MSN® Messenger, Google Talk™, ICQ, SIP, Twitter, Yahoo!™ and AIM®* friends using your handset’s internet connection rather than costly cellular airtime minutes.
Bringing PC-benefits to the mobile, fring will empower you with mobility and availability as never …

We are working on a reference document to help sort through all of the options if you want to use your mobile phone while traveling outside the US. There are many. It really depends on how often you travel out of the country and how many calls you anticipate on making.
Take a look at our guide: Global Connections – A How to Guide on Using Your Mobile Phone Internationally
One company to consider is Telna Mobile. You get a US phone number with low inbound rates and free inbound text messages. …