Xtractpler

For the price, this does exactly what you need it to do.

I have few synths that I needed to multisample and didn't fancy the task fo doing it myself. I saw this one on offer and figured it was worth a go at such a low price.
At first I had an issue which was resolved very quickly with an coupl of emails back and forth with the developer. They actually updated the app to make sure the issues wasn't possible in the future which is great service!

After that initial bump (which was cleared up in a matrer of hours) I have all the multisamples of the synths I needed and a few nice templates built for future use.

Building the templates themself is easy enough, although as a feature request - in NOTE row maybe have a drop down menu with the note/octave in? So instead of putting in 48 you can just select C3 etc.. it would save people having to refer to a chart for note numbers to actual real world note and octave information.