If you've got an iPhone it's a sure bet that you've had a wander through the App Store. The range of applications is quite incredible. What I've been amazed with is the quality of the free software. This week, I'm taking a look at three freebies; a game, a work tool and something a little off the wall.

Sol Free

When it comes to games, you can't go past good old Solitaire. Sol Free has five different varieties of Solitaire that you can play totally gratis. The software is reliable and has never caused my iPhone to freeze or crash. Game play relies on the touchscreen with my only criticism being that some of the cards are a little tough to hit with a fingertip as they're quite small. However, it's been very hand when filling in a few spare moments when standing in a queue or when my brain's too fired for anything taxing.

FTP on the Go

I've recently configured my NAS to be a FTP server so that I can access my files remotely. FTP on the Go is an easy-to-use FTP client that supports secure connections. It uses the iPhone's file viewer so that you an remotely read files and also boasts of the ability to be able to remotely edit text files. In other words, this can be handy if you have to do some on-the-fly website maintenance. It can also be used to upload photos shot with the iPhone's camera.

A Free Level

Every now and then I need a spirit level. It might be when hanging a picture or if I move the fridge. Given that I am something a lazy bugger I usually can't be bothered walking back to the shed to get a level. A Free Level is exactly what the name says. It uses the iPhone's accelerometers to make the iPhone into a spirit level. It's very accurate (I tested it with a real level) with my only criticism being that it makes an annoying sound. Otherwise, it's very useful.

All of these can be found by searching for the application name in the App Store either on your iPhone or in the iTunes Store.

So, what iPhone apps have you discovered that are hidden gems in the App Store?