1. PhoneTorch

An awesome application that enables a feature that was impossible to have on S60 3rd Ed devices. With this application you can use the Flash of your Nokia 5800 as a Flashlight, extremely useful in the dark, or when camping or entering late in the cinema. PhoneTorch just converts your 5800 into a flashlight for free! It also lets you choose between the red and white light of the flash. And in case you get lost in an island or something, this app lets you transmit morse code, you just write the message and the app will send it in morse with the flashlight, pretty cool! You can download it here: http://dev.meh.at/

2.Mobbler

Mobbler is a really cool application for the Nokia N97 and 5800, it lets you connect to your LAST.FM library from your device and hear your playlist and scrobble music directly from your device. It also lets you search for artist and it will then let you hear music from that artist and other similar artist, the cool thing about this app is that you get to know a lot of new music that you did not know. First, you need to sign up for LAST.FM here: SignUp and then you have to install Mobbler on your device, you can get it here: Mobbler 

3. Dabr

Dabr is not an application, is more of a web service for mobile devices. It is a Twitter client for Nokia phones, so you can do a lot of things on Dabr that you can’t do on Twitter. For example, you can favorite Tweets, post pictures and private message someone as well as search, ReTweet and see followers. It is Mobile Twitter on Steroids according to its creator. To use Dabr just go to Dabr.co.uk on your mobile device.

4.Google Maps

Google Maps is a must have on every S60 device, its functionality is just amazing and is a very useful application as long as you have unlimited internet. With google maps you can search for anything and then get direction to reach that place in the shortest time available. Google maps uses the internal GPS of  the N97 and 5800, so you can know where you are exactly at every time. Another cool feature of google maps is that you can view detailed information of the place you are going, such as openinng hours and the phone number that is automatically dialed when the green key is pressed. To download google maps just go here: GMaps

5. Photo Browser

Photo Browser is an application created by the Nokia Beta Labs Team it is a really cool application that lets you browse your photos in a very cool and useful way. The photo browser has an amazing interface that even makes iPhone users jealous, when I show off my Nokia 5800, photo browser is the first application I always open to impress everyone. Photo Browser is hard to describe, so better watch this video! You can download it here: PhotoBrowser