Welcome, and glad to be of some use
.
About ActivePixels, I think you are right. There does not seem to be a portable version available on its home site.
Here is the link to the page offering free version of Winsnap. I could not find the link when I looked on site initially. But, then I searched for "winsnap free" on Google, and this turned up. I would not have searched if you had not asked for last freeware version. I would not have known if a free version existed. Anyways, here is the link:
http://www.ntwind.com/software/winsn...e-version.html