Amplitube Fender, perhaps my favourite IK sim is available for £4.99, as is Amplitube Hendrix (the Uni-vibe is worth that by itself). Also coming in at £4.99 is the rather flat Amplitube Slash and the considerably more entertaining Amplitube Orange.
To be honest, the effects tend to be more successful than the rather flat sounding amps. IK really need a major update to this series of ampsims which is really showing it’s age now. I mean, have they heard Tonestack?