In this video I introduce a simple and free online application called CRewriter. You can find this program by going to crewriter.com and asked stated it's completely free to use.
This program does, is is just you with article spinning. You can simply select words, sentences, or any amount of text you like and then enter variations and the CRewriter will add curly brackets and pipes for you. What you get as an output is a spin-ready text in the spinner syntax format.
The two really works quite well and I like the fact that it is really a manual rewriting tool, so that your texts don't get messed up with automatically selected synonyms that don't fit at all (which is what auto-spinning tools tend to).