Computer/phone software applications that may be invaluable to those who struggle to learn tunes by ear

Along with his report from the Bridge of Allan weekend, Bjorn mentioned a piece of software that he had tried called ‘Amazing Slow Downer’. Intrigued, I looked up this program and downloaded the free trial version. However, a google search for ‘Slowdowner’ revealed a number of things. Firstly, there are a lot [I mean a lot!] of options available for software that does this sort of thing, though this one seems to be the most widely–used. Some of these have user-interfaces that are rather more friendly than this one. I was particularly impressed by the interface for Transcribe!.
In the process of this search I discovered that freely available software such as Windows Media Player and Quicktime also provides some of the features- the free audio-editing software ‘Audacity’ provides most of the features too; the chief advantage of buying software such as the one here is that these programmes can change pitch and tempo ‘on the fly’ and have an interface designed to do the one job.
You can use a CD or any audio file on your system. You can choose any speed by moving the slider, and you can change pitch in a similar way. This is not only valuable for learning a tune from recordings, but it is particularly useful for pipers, not only for identifying gracings in a performance, but also, if you listen to your own performance [you can record direct into the software], you can identify passing-notes and other errors. Both items cost around $40.
Amazing Slowdowner