The second one looks to be a pig's face. Not sure about the others.

2nd and 3rd plants look like sedums (stonecrop)

The first one looks like a shrubby cinquefoil, though it's the largest flower I've ever seen on one. The second one looks like a portulaca, though it could be a sedum. The third one is probably a sedum, maybe goldmoss sedum?

You will find information about the first one on this link. It is a potentilla fruticosa. It is a small to fairly large shrub depending on which one you have. http://www.gardenaction.co.uk/plantfinder/potentilla-1.asp
The second one looks like sedum reflexum Iceberg. I have a photo of this on my page.I am using it in a hanging basket.
The third looks like sedum acre.

agree with scotsgran the top ones a shrubby potentilla, if you pinch out the top it should begin to bush out more

The first is some kind of Potentilla

the 2nd one i think has delicate pink flowers and is a succulent
3rd one i know of but i cabt think what its called

Thank you all for the answers and suggestions. I suppose when the second and third plants flower I will be more sure what variety of sedums they are. I have labelled the first one as potentilla fruticosa. Thanks all once again for your help. :-)